Merge "Add OWNERS file for assist structure test" am: 6efe7e60e5 am: 37b781d11c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1532322

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I61c18a4bd3c8a8cbdfa71e10818f0c087ceb966e