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

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



Change-Id: I3bd47d8c7c05a92d0ba6f663105bdbdd6043d26a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>