Fix guava source navigation.
Fix guava source navigation.

Summary:
Previously guava 20 documentation had a higher precedence leading
to confusing or no documentation.

Reviewed By: bobyangyf

fbshipit-source-id: ae9bbf4

LegNeato/buck,facebook/buck,facebook/buck,facebook/buck,shs96c/buck,romanoid/buck,brettwooldridge/buck,Addepar/buck,brettwooldridge/buck,brettwooldridge/buck,Addepar/buck,SeleniumHQ/buck,romanoid/buck,rmaz/buck,JoelMarcey/buck,SeleniumHQ/buck,LegNeato/buck,Addepar/buck,JoelMarcey/buck,brettwooldridge/buck,brettwooldridge/buck,LegNeato/buck,romanoid/buck,kageiit/buck,brettwooldridge/buck,zpao/buck,LegNeato/buck,shs96c/buck,shs96c/buck,LegNeato/buck,SeleniumHQ/buck,rmaz/buck,nguyentruongtho/buck,LegNeato/buck,rmaz/buck,brettwooldridge/buck,brettwooldridge/buck,SeleniumHQ/buck,SeleniumHQ/buck,JoelMarcey/buck,JoelMarcey/buck,facebook/buck,zpao/buck,Addepar/buck,SeleniumHQ/buck,LegNeato/buck,zpao/buck,JoelMarcey/buck,romanoid/buck,nguyentruongtho/buck,SeleniumHQ/buck,rmaz/buck,shs96c/buck,Addepar/buck,romanoid/buck,SeleniumHQ/buck,romanoid/buck,SeleniumHQ/buck,LegNeato/buck,SeleniumHQ/buck,shs96c/buck,zpao/buck,romanoid/buck,Addepar/buck,kageiit/buck,brettwooldridge/buck,brettwooldridge/buck,shs96c/buck,Addepar/buck,JoelMarcey/buck,zpao/buck,rmaz/buck,Addepar/buck,kageiit/buck,LegNeato/buck,romanoid/buck,romanoid/buck,nguyentruongtho/buck,brettwooldridge/buck,rmaz/buck,shs96c/buck,LegNeato/buck,rmaz/buck,shs96c/buck,shs96c/buck,nguyentruongtho/buck,brettwooldridge/buck,JoelMarcey/buck,kageiit/buck,rmaz/buck,JoelMarcey/buck,facebook/buck,rmaz/buck,facebook/buck,JoelMarcey/buck,Addepar/buck,JoelMarcey/buck,rmaz/buck,Addepar/buck,rmaz/buck,SeleniumHQ/buck,nguyentruongtho/buck,brettwooldridge/buck,shs96c/buck,LegNeato/buck,JoelMarcey/buck,JoelMarcey/buck,LegNeato/buck,shs96c/buck,kageiit/buck,SeleniumHQ/buck,romanoid/buck,nguyentruongtho/buck,kageiit/buck,SeleniumHQ/buck,nguyentruongtho/buck,Addepar/buck,zpao/buck,Addepar/buck,shs96c/buck,kageiit/buck,rmaz/buck,romanoid/buck,LegNeato/buck,facebook/buck,JoelMarcey/buck,romanoid/buck,rmaz/buck,shs96c/buck,romanoid/buck,zpao/buck,Addepar/buck