Revert "Track Device Handler Repo"

This reverts commit 837d23c1cd835102ca8a1a796030bbbbeeef33b5.

Change-Id: Ie1b2b9fe3640b767ea664330fae3204ab7fb3edc
default: Track CM's Gallery2

Doesn't it make sense to track CM's Gallery2,
since we track their Camera2?

Change-Id: I66962f9ecc77beb85d2c74791c6b53971cec3658
Fix Repo Name

Change-Id: I354cb42802dd072b8e160acb6a66153ac99bdf36