Merge "Add OWNERS file for assist structure test" am: 6efe7e60e5 am: 37b781d11c am: ae3b4b9572

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iefa299c1c8b1a9ff9c0f1daa925d0c7672f0037b