Merge "Add unit test on sending power hints in SurfaceFlinger" into tm-dev am: 82237710

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/17573287



Change-Id: Ic5abaf9f76020dee7dd0aced0f222d7ced18b5dc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>