Improve OWNERS coverage across frameworks/base/. am: 061c2ec3b6 am: b84eaab331

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1519382

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I7f2d3439880f448dc13b94541880c779e69d3be4