Merge "Add OWNERS file for UsageStats unit tests." am: eeb577dc44 am: df5a88ea6d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1614160

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9de24124f6c17a188469c529dafec410eca4973b