Fix potential decrypt src pointer overflow. am: c14f262876 am: 107233b3dd am: e289b4aa83 am: 92d4d99b98

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/13472562

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I726f9314c913abc14f267cd57a9b80e5542b0950