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: cc5019f6 am: beb008e8

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



Change-Id: I94186f46f899365f65dd066cefd18d2f9166eee7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>