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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5755b0cdf3ff55f7d689a66af192f5df18062f41