Merge "Save brightness into persistent data store using a handler" into tm-dev...

Merge "Save brightness into persistent data store using a handler" into tm-dev am: bd35c8da am: 6c52af79

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17654877



Change-Id: I301d14308d68059eea6171bfcc001e6ad6d2dc0b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>