Revert "Ambient Display"

This does not work without kernel and displayHAL changes.  In addition, we likely do not have the hardware to do this efficiently.  Motorola devices have low power sensors from Texas Instruments as well as AMOLED screens, so this would use less power for them.

This reverts commit 7a29ca968bc531fd78ab24ff31e8d35b368fca41.

Change-Id: I99a26783f6cecaf31a09f3d25036e87fe19de967
Merge "Revert "Ambient Display"" into lp5.0