[RESTRICT AUTOMERGE] clearkey hidl CryptoPlugin: security fixes

* reject native handle output
* validate subsample sizes

Bug: 137283376
Test: cryptopoc
Change-Id: Ic4267fdc0e391bdecc1caab3b8fd4aa34ad76541
(cherry picked from commit 5dd7590c6c6fcedd77ac5ec2dd97c8badfb9eb36)
1 file changed