Merge "sf: Allow SystemServer to set the display brightness" am: 9861ecb7c8

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2259832

Change-Id: I5add818598a66f0969731099af1fa43484d068c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>