[automerger skipped] [RESTRICT AUTOMERGE] Fix potential decrypt destPtr overflow. am: 3c9044cdef am: 4fe8977083 -s ours am: 95e19c5894

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/13461242

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Icedc94ae1ddcdf0b0ee91851216f835462d30680