Make CameraService AppOps check safer for the UX

Summary:
This ensures that we allow camera for now. In the future when appops isn't set to false,
this will also correct denials when appops has not been used.

Test Plan: win

Reviewers: randall.rushing, Mustaavalkosta, michyprima, Roach, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D308