Merge "Update OWNERs for SystemUI related files" am: c235d21e am: 28314791

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1554781

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I01b3060f02f5930185e08b4bbf80a65583b9d2c6