Move device/google/atv overlays into SystemUI

There was no need for a separate RRO for this. Television UI mode covers
everything needed for a default TV overlay.

Test: make dist
Bug: 173138807
Merged-In: If689c72c22e140a142d86861b3273b40de3a6496
Change-Id: If689c72c22e140a142d86861b3273b40de3a6496