Add PermittedSubclasses Class API am: a0191bc619

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

Change-Id: Ia399e3d26a12aaef3110849cbfca769c4ea404aa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>