Merge "Add OWNERS file for assist structure test" am: 6efe7e60 am: 37b781d1 am: ae3b4b95

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iefa299c1c8b1a9ff9c0f1daa925d0c7672f0037b