Merge "Add OWNERS file for attestation" am: ba2a123820 am: d9ba892bc7 am: 03a4d08fed

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1532899

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I382b5e2c8395ce3d42cd4f0d8dfb9835b38fe4c0