Put geofence providers in common overlay

Summary: This helps gapps provide proper location services support

Test Plan: may help with hammerhead location service fail, as reported by @kevdliu

Reviewers: synergy, anders3408, jriordan001, donald.munn, raymanfx

Reviewed By: synergy

CC: kevdliu

Differential Revision: http://review.codefirex.com/D180