Merge "Set mBrightness when needsComposite is zero" into tm-qpr-dev am: ced82308d4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/19868745

Change-Id: I041f5b95a218d48676912322fd0e24f7d2e62196
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>