Merge "cts-tradefed: refer to frameworks/base for per-file backup OWNERS." am: df49e08415 am: cfbd540bbe am: 1d92c4baab

Original change: https://android-review.googlesource.com/c/platform/cts/+/1564372

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8c81ee2e9ba49098d1c0a40ac4dd0b23ff25241e