Improve OWNERS coverage across frameworks/base/. am: e16e371fcd

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1519383

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I0211462ecbcd9ad66f66af87e31cf12e1582fc65
tree: 093636780c6ef6f36c08239240e4a8309ff6edc6
  1. stats/