Merge "Invoke BrightnessSetting callbacks even with identical brightness." into tm-dev am: aabe27b7 am: fd51081e am: 9d65c21e am: 81b235fd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17916604



Change-Id: I49adbda72f5fef7914939d2f2cfa1f47627e910d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>