Bug 1394786: action extension UTI needs to be public.url (#3137)
Bug 1394786: action extension UTI needs to be public.url (#3137)

BANDAID ONLY: this fixes everything except 1PW no longer shows as an option. A better solution to follow ASAP.

As of iOS11 we are getting this error reported when tapping extensions that
share the URL:
`Cannot load representation of type org.appextension.fill-browser-action`
There are 2 types of UTI we report: org.appextension.fill-browser-action and
public.url.
For some reason we returned the former in nearly all cases (not sure why, maybe
a legacy reason).
If itemForActivityType is changed to always return public.url, it works on iOS
10 and 11, and pw extensions still work ok.
Acidburn0zzz/firefox-ios,eoger/firefox-ios,farhanpatel/firefox-ios,garvankeeley/firefox-ios,DarrenKong/firefox-ios,jacobwhite/firefox-ios,AaronMT/firefox-ios,AaronMT/firefox-ios,SuPair/firefox-ios,mozilla-mobile/firefox-ios,mkaply/firefox-ios,StYaphet/firefox-ios,DarrenKong/firefox-ios,tecgirl/firefox-ios,kesun421/firefox-ios,kesun421/firefox-ios,Acidburn0zzz/firefox-ios,garvankeeley/firefox-ios,SuPair/firefox-ios,farhanpatel/firefox-ios,vbudhram/firefox-ios,Ehrippura/firefox-ios,justindarc/firefox-ios,Bunn/firefox-ios,AaronMT/firefox-ios,Acidburn0zzz/firefox-ios,vbudhram/firefox-ios,justindarc/firefox-ios,tecgirl/firefox-ios,flodolo/firefox-ios,jacobwhite/firefox-ios,Ehrippura/firefox-ios,st3fan/firefox-ios,SuPair/firefox-ios,eoger/firefox-ios,ncalexan/firefox-ios,Bunn/firefox-ios,mozilla-mobile/firefox-ios,st3fan/firefox-ios,mozilla-mobile/firefox-ios,Bunn/firefox-ios,tecgirl/firefox-ios,tecgirl/firefox-ios,flodolo/firefox-ios,kesun421/firefox-ios,st3fan/firefox-ios,StYaphet/firefox-ios,SuPair/firefox-ios,HongliYu/firefox-ios,tecgirl/firefox-ios,kesun421/firefox-ios,garvankeeley/firefox-ios,Bunn/firefox-ios,justindarc/firefox-ios,Acidburn0zzz/firefox-ios,flodolo/firefox-ios,vbudhram/firefox-ios,vbudhram/firefox-ios,Ehrippura/firefox-ios,eoger/firefox-ios,HongliYu/firefox-ios,vbudhram/firefox-ios,Acidburn0zzz/firefox-ios,farhanpatel/firefox-ios,DarrenKong/firefox-ios,jacobwhite/firefox-ios,Bunn/firefox-ios,mkaply/firefox-ios,SuPair/firefox-ios,vbudhram/firefox-ios,ncalexan/firefox-ios,mkaply/firefox-ios,StYaphet/firefox-ios,Bunn/firefox-ios,mozilla-mobile/firefox-ios,HongliYu/firefox-ios,garvankeeley/firefox-ios,st3fan/firefox-ios,justindarc/firefox-ios,st3fan/firefox-ios,HongliYu/firefox-ios,Ehrippura/firefox-ios,DarrenKong/firefox-ios,Acidburn0zzz/firefox-ios,eoger/firefox-ios,farhanpatel/firefox-ios,st3fan/firefox-ios,tecgirl/firefox-ios,flodolo/firefox-ios,mkaply/firefox-ios,SuPair/firefox-ios,flodolo/firefox-ios,Ehrippura/firefox-ios,StYaphet/firefox-ios,StYaphet/firefox-ios,st3fan/firefox-ios,AaronMT/firefox-ios,jacobwhite/firefox-ios,SuPair/firefox-ios,ncalexan/firefox-ios,DarrenKong/firefox-ios,mkaply/firefox-ios,HongliYu/firefox-ios,StYaphet/firefox-ios,mozilla-mobile/firefox-ios,jacobwhite/firefox-ios,Ehrippura/firefox-ios,farhanpatel/firefox-ios,justindarc/firefox-ios,StYaphet/firefox-ios,HongliYu/firefox-ios,farhanpatel/firefox-ios,kesun421/firefox-ios,mozilla-mobile/firefox-ios,eoger/firefox-ios,kesun421/firefox-ios,vbudhram/firefox-ios,tecgirl/firefox-ios,AaronMT/firefox-ios,farhanpatel/firefox-ios,eoger/firefox-ios,ncalexan/firefox-ios,AaronMT/firefox-ios,Ehrippura/firefox-ios,StYaphet/firefox-ios,st3fan/firefox-ios,flodolo/firefox-ios,ncalexan/firefox-ios,mkaply/firefox-ios,Acidburn0zzz/firefox-ios,mkaply/firefox-ios,Acidburn0zzz/firefox-ios,AaronMT/firefox-ios,garvankeeley/firefox-ios,tecgirl/firefox-ios,garvankeeley/firefox-ios,jacobwhite/firefox-ios,garvankeeley/firefox-ios,justindarc/firefox-ios,kesun421/firefox-ios,mozilla-mobile/firefox-ios,eoger/firefox-ios,flodolo/firefox-ios,ncalexan/firefox-ios,Bunn/firefox-ios,DarrenKong/firefox-ios,ncalexan/firefox-ios,DarrenKong/firefox-ios,jacobwhite/firefox-ios,HongliYu/firefox-ios,justindarc/firefox-ios