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: 5d8f30b2 am: 21c0ee02

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



Change-Id: Icc9beed35331f4b7a61169db2e1d0fec301ba5ff
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>