Merge "Get brightness adb command" into aosp-main-future am: 12ca1950

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/28428827



Change-Id: I6e5f9f0f822009d04b4f79e416fab4a437013c5b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>