Make ExoPackageInstaller.installFile() a bit more generic.
Make ExoPackageInstaller.installFile() a bit more generic.

Summary:
Do not hard code the "secondary-dex" directory so that it can be used to
install a file to any arbitrary location under dataRoot.

Test Plan:
buck test --all
buck install <exopackage_target>

Addepar/buck,sdwilsh/buck,shybovycha/buck,justinmuller/buck,Distrotech/buck,clonetwin26/buck,daedric/buck,siddhartharay007/buck,dushmis/buck,SeleniumHQ/buck,grumpyjames/buck,rhencke/buck,justinmuller/buck,zhan-xiong/buck,Dominator008/buck,vschs007/buck,zhan-xiong/buck,Addepar/buck,robbertvanginkel/buck,mnuessler/buck,LegNeato/buck,bocon13/buck,nguyentruongtho/buck,dushmis/buck,rowillia/buck,rmaz/buck,daedric/buck,MarkRunWu/buck,mogers/buck,shybovycha/buck,brettwooldridge/buck,illicitonion/buck,1yvT0s/buck,Dominator008/buck,facebook/buck,1yvT0s/buck,hgl888/buck,zpao/buck,JoelMarcey/buck,dushmis/buck,vschs007/buck,Heart2009/buck,davido/buck,k21/buck,illicitonion/buck,shybovycha/buck,clonetwin26/buck,romanoid/buck,illicitonion/buck,kageiit/buck,OkBuilds/buck,neonichu/buck,zpao/buck,justinmuller/buck,mnuessler/buck,k21/buck,artiya4u/buck,dpursehouse/buck,justinmuller/buck,tgummerer/buck,zhan-xiong/buck,illicitonion/buck,mikekap/buck,JoelMarcey/buck,davido/buck,OkBuilds/buck,mikekap/buck,brettwooldridge/buck,illicitonion/buck,JoelMarcey/buck,daedric/buck,mogers/buck,nguyentruongtho/buck,Distrotech/buck,darkforestzero/buck,LegNeato/buck,mikekap/buck,stuhood/buck,mikekap/buck,SeleniumHQ/buck,dpursehouse/buck,luiseduardohdbackup/buck,dushmis/buck,MarkRunWu/buck,rowillia/buck,liuyang-li/buck,zhuxiaohao/buck,daedric/buck,dsyang/buck,JoelMarcey/buck,zhan-xiong/buck,zhuxiaohao/buck,k21/buck,neonichu/buck,clonetwin26/buck,MarkRunWu/buck,kageiit/buck,stuhood/buck,dpursehouse/buck,OkBuilds/buck,sdwilsh/buck,Addepar/buck,rmaz/buck,tgummerer/buck,brettwooldridge/buck,ilya-klyuchnikov/buck,liuyang-li/buck,kageiit/buck,MarkRunWu/buck,mnuessler/buck,liuyang-li/buck,vschs007/buck,nguyentruongtho/buck,vschs007/buck,daedric/buck,shybovycha/buck,justinmuller/buck,Learn-Android-app/buck,zhan-xiong/buck,robbertvanginkel/buck,sdwilsh/buck,artiya4u/buck,shybovycha/buck,dpursehouse/buck,dpursehouse/buck,facebook/buck,ilya-klyuchnikov/buck,janicduplessis/buck,liuyang-li/buck,vine/buck,kageiit/buck,zhan-xiong/buck,Dominator008/buck,justinmuller/buck,davido/buck,k21/buck,nguyentruongtho/buck,SeleniumHQ/buck,marcinkwiatkowski/buck,sdwilsh/buck,ilya-klyuchnikov/buck,dushmis/buck,liuyang-li/buck,grumpyjames/buck,janicduplessis/buck,robbertvanginkel/buck,shs96c/buck,LegNeato/buck,Dominator008/buck,ilya-klyuchnikov/buck,Addepar/buck,pwz3n0/buck,ilya-klyuchnikov/buck,siddhartharay007/buck,1yvT0s/buck,dsyang/buck,Addepar/buck,dpursehouse/buck,nguyentruongtho/buck,darkforestzero/buck,rhencke/buck,k21/buck,vine/buck,pwz3n0/buck,rhencke/buck,mogers/buck,clonetwin26/buck,siddhartharay007/buck,darkforestzero/buck,darkforestzero/buck,ilya-klyuchnikov/buck,Distrotech/buck,k21/buck,liuyang-li/buck,siddhartharay007/buck,tgummerer/buck,dushmis/buck,mogers/buck,MarkRunWu/buck,shybovycha/buck,darkforestzero/buck,neonichu/buck,davido/buck,ilya-klyuchnikov/buck,rowillia/buck,Addepar/buck,1yvT0s/buck,LegNeato/buck,rowillia/buck,shs96c/buck,mnuessler/buck,zhuxiaohao/buck,romanoid/buck,SeleniumHQ/buck,daedric/buck,shybovycha/buck,marcinkwiatkowski/buck,rowillia/buck,sdwilsh/buck,clonetwin26/buck,brettwooldridge/buck,rowillia/buck,artiya4u/buck,Addepar/buck,illicitonion/buck,vschs007/buck,OkBuilds/buck,OkBuilds/buck,romanoid/buck,brettwooldridge/buck,bocon13/buck,marcinkwiatkowski/buck,artiya4u/buck,daedric/buck,romanoid/buck,mogers/buck,Distrotech/buck,k21/buck,neonichu/buck,mogers/buck,sdwilsh/buck,Learn-Android-app/buck,dsyang/buck,rhencke/buck,shs96c/buck,Distrotech/buck,zpao/buck,rhencke/buck,SeleniumHQ/buck,dushmis/buck,raviagarwal7/buck,neonichu/buck,raviagarwal7/buck,mnuessler/buck,SeleniumHQ/buck,vine/buck,LegNeato/buck,rhencke/buck,illicitonion/buck,LegNeato/buck,brettwooldridge/buck,vschs007/buck,raviagarwal7/buck,illicitonion/buck,Dominator008/buck,artiya4u/buck,marcinkwiatkowski/buck,clonetwin26/buck,facebook/buck,facebook/buck,janicduplessis/buck,Distrotech/buck,rmaz/buck,Heart2009/buck,bocon13/buck,shs96c/buck,mogers/buck,romanoid/buck,Distrotech/buck,daedric/buck,shs96c/buck,raviagarwal7/buck,Learn-Android-app/buck,raviagarwal7/buck,liuyang-li/buck,grumpyjames/buck,1yvT0s/buck,mikekap/buck,zhan-xiong/buck,raviagarwal7/buck,k21/buck,grumpyjames/buck,daedric/buck,illicitonion/buck,k21/buck,zhuxiaohao/buck,bocon13/buck,illicitonion/buck,ilya-klyuchnikov/buck,liuyang-li/buck,raviagarwal7/buck,nguyentruongtho/buck,LegNeato/buck,LegNeato/buck,hgl888/buck,vine/buck,marcinkwiatkowski/buck,tgummerer/buck,Dominator008/buck,darkforestzero/buck,shybovycha/buck,mogers/buck,SeleniumHQ/buck,k21/buck,facebook/buck,OkBuilds/buck,rmaz/buck,luiseduardohdbackup/buck,dsyang/buck,lukw00/buck,darkforestzero/buck,sdwilsh/buck,sdwilsh/buck,tgummerer/buck,romanoid/buck,mogers/buck,davido/buck,Learn-Android-app/buck,daedric/buck,Addepar/buck,hgl888/buck,vine/buck,zhuxiaohao/buck,raviagarwal7/buck,ilya-klyuchnikov/buck,dsyang/buck,Dominator008/buck,darkforestzero/buck,davido/buck,siddhartharay007/buck,luiseduardohdbackup/buck,marcinkwiatkowski/buck,raviagarwal7/buck,neonichu/buck,LegNeato/buck,sdwilsh/buck,rmaz/buck,dpursehouse/buck,janicduplessis/buck,stuhood/buck,OkBuilds/buck,Learn-Android-app/buck,justinmuller/buck,davido/buck,shs96c/buck,justinmuller/buck,grumpyjames/buck,rhencke/buck,zhuxiaohao/buck,luiseduardohdbackup/buck,rowillia/buck,shs96c/buck,SeleniumHQ/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,rmaz/buck,lukw00/buck,illicitonion/buck,pwz3n0/buck,justinmuller/buck,brettwooldridge/buck,darkforestzero/buck,shybovycha/buck,kageiit/buck,grumpyjames/buck,Distrotech/buck,JoelMarcey/buck,rhencke/buck,brettwooldridge/buck,LegNeato/buck,hgl888/buck,vschs007/buck,mikekap/buck,clonetwin26/buck,grumpyjames/buck,janicduplessis/buck,kageiit/buck,Heart2009/buck,Distrotech/buck,lukw00/buck,Learn-Android-app/buck,shs96c/buck,nguyentruongtho/buck,romanoid/buck,daedric/buck,dushmis/buck,mikekap/buck,shs96c/buck,LegNeato/buck,Dominator008/buck,Addepar/buck,justinmuller/buck,rowillia/buck,1yvT0s/buck,zhan-xiong/buck,hgl888/buck,OkBuilds/buck,sdwilsh/buck,Distrotech/buck,brettwooldridge/buck,davido/buck,darkforestzero/buck,facebook/buck,romanoid/buck,facebook/buck,artiya4u/buck,rowillia/buck,zhuxiaohao/buck,lukw00/buck,kageiit/buck,robbertvanginkel/buck,pwz3n0/buck,vschs007/buck,grumpyjames/buck,rhencke/buck,marcinkwiatkowski/buck,JoelMarcey/buck,OkBuilds/buck,siddhartharay007/buck,JoelMarcey/buck,zpao/buck,MarkRunWu/buck,sdwilsh/buck,tgummerer/buck,rmaz/buck,mnuessler/buck,mikekap/buck,zpao/buck,vschs007/buck,rowillia/buck,hgl888/buck,robbertvanginkel/buck,Learn-Android-app/buck,brettwooldridge/buck,luiseduardohdbackup/buck,rowillia/buck,liuyang-li/buck,vine/buck,illicitonion/buck,tgummerer/buck,janicduplessis/buck,dsyang/buck,darkforestzero/buck,tgummerer/buck,hgl888/buck,marcinkwiatkowski/buck,zhan-xiong/buck,stuhood/buck,1yvT0s/buck,zpao/buck,shybovycha/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,rmaz/buck,daedric/buck,romanoid/buck,bocon13/buck,vine/buck,siddhartharay007/buck,mikekap/buck,Addepar/buck,marcinkwiatkowski/buck,rowillia/buck,zhuxiaohao/buck,mogers/buck,robbertvanginkel/buck,clonetwin26/buck,janicduplessis/buck,luiseduardohdbackup/buck,clonetwin26/buck,pwz3n0/buck,liuyang-li/buck,bocon13/buck,mikekap/buck,mikekap/buck,lukw00/buck,zhan-xiong/buck,Distrotech/buck,davido/buck,zhan-xiong/buck,JoelMarcey/buck,vschs007/buck,SeleniumHQ/buck,1yvT0s/buck,mnuessler/buck,Dominator008/buck,vine/buck,OkBuilds/buck,SeleniumHQ/buck,lukw00/buck,sdwilsh/buck,brettwooldridge/buck,clonetwin26/buck,JoelMarcey/buck,Addepar/buck,stuhood/buck,k21/buck,dushmis/buck,MarkRunWu/buck,k21/buck,marcinkwiatkowski/buck,justinmuller/buck,Dominator008/buck,davido/buck,rmaz/buck,hgl888/buck,pwz3n0/buck,Heart2009/buck,shs96c/buck,rmaz/buck,luiseduardohdbackup/buck,justinmuller/buck,vschs007/buck,Addepar/buck,siddhartharay007/buck,ilya-klyuchnikov/buck,shs96c/buck,zhan-xiong/buck,Heart2009/buck,mikekap/buck,dsyang/buck,pwz3n0/buck,JoelMarcey/buck,davido/buck,artiya4u/buck,bocon13/buck,grumpyjames/buck,romanoid/buck,mnuessler/buck,neonichu/buck,OkBuilds/buck,davido/buck,robbertvanginkel/buck,janicduplessis/buck,raviagarwal7/buck,marcinkwiatkowski/buck,pwz3n0/buck,rhencke/buck,brettwooldridge/buck,tgummerer/buck,zhuxiaohao/buck,clonetwin26/buck,vine/buck,artiya4u/buck,hgl888/buck,bocon13/buck,Dominator008/buck,dpursehouse/buck,JoelMarcey/buck,SeleniumHQ/buck,shybovycha/buck,bocon13/buck,neonichu/buck,MarkRunWu/buck,stuhood/buck,zpao/buck,bocon13/buck,shybovycha/buck,dushmis/buck,dsyang/buck,romanoid/buck,rmaz/buck,artiya4u/buck,Heart2009/buck,brettwooldridge/buck,stuhood/buck,raviagarwal7/buck,vschs007/buck,neonichu/buck,janicduplessis/buck,k21/buck,Learn-Android-app/buck,ilya-klyuchnikov/buck,janicduplessis/buck,pwz3n0/buck,marcinkwiatkowski/buck,janicduplessis/buck,bocon13/buck,grumpyjames/buck,SeleniumHQ/buck,stuhood/buck,rhencke/buck,stuhood/buck,romanoid/buck,davido/buck,zhan-xiong/buck,Addepar/buck,artiya4u/buck,dsyang/buck,darkforestzero/buck,mogers/buck,Learn-Android-app/buck,dsyang/buck,raviagarwal7/buck,robbertvanginkel/buck,artiya4u/buck,lukw00/buck,lukw00/buck,romanoid/buck,rmaz/buck,shybovycha/buck,robbertvanginkel/buck,dsyang/buck,illicitonion/buck,pwz3n0/buck,1yvT0s/buck,LegNeato/buck,rmaz/buck,darkforestzero/buck,OkBuilds/buck,grumpyjames/buck,vine/buck,mnuessler/buck,vine/buck,Dominator008/buck,Learn-Android-app/buck,dsyang/buck,robbertvanginkel/buck,tgummerer/buck,JoelMarcey/buck,lukw00/buck,Heart2009/buck,LegNeato/buck,luiseduardohdbackup/buck,vschs007/buck,clonetwin26/buck,sdwilsh/buck,grumpyjames/buck,robbertvanginkel/buck,stuhood/buck,JoelMarcey/buck,shs96c/buck,luiseduardohdbackup/buck,shs96c/buck,siddhartharay007/buck,clonetwin26/buck,robbertvanginkel/buck,pwz3n0/buck,OkBuilds/buck,justinmuller/buck,stuhood/buck,bocon13/buck,Learn-Android-app/buck,Heart2009/buck,liuyang-li/buck,lukw00/buck,marcinkwiatkowski/buck,dsyang/buck,raviagarwal7/buck,janicduplessis/buck,tgummerer/buck,daedric/buck,lukw00/buck,Heart2009/buck