Add PermittedSubclasses Class API am: a0191bc619 am: 172ac6ebf4 am: d35d6d0306 am: 5fefd3b717 am: e072b7194a

Original change: https://android-review.googlesource.com/c/platform/art/+/2129392

Change-Id: I573957d684098640f466106a46c2f8c1985d29b5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>