Merge "Add OWNERS block for migration" am: 3dcbcae839 am: ff4dd6912d am: 4b0c629932

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1715476

Change-Id: I8bc8d16e7a6cf0b5a032fc2ea42d6f93cd3d77f2