Merge "Create its own Handler instance for persisting display brightness" into...

Merge "Create its own Handler instance for persisting display brightness" into tm-dev am: e8f4a6d6 am: 76a46ead am: f5c021c6 am: 56d23428

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18827235



Change-Id: I5be9d4a4c4153ab932ef528bff1e541fe1bd912b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>