Merge "Set mBrightness when needsComposite is zero" into tm-qpr-dev am: ced82308d4 am: f2b19cdcde

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

Change-Id: Ief2d039b9c01bf95fc02b9e1bba404818f679ccf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>