Fix potential decrypt src pointer overflow. am: c9b5693c am: 42546662 am:...

Fix potential decrypt src pointer overflow. am: c9b5693c am: 42546662 am: e0db28bc am: 68e65826 am: 227bdb51 am: 2473318b am: bd1d88aa am: 5701ed92

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/13412307

Change-Id: Ib38d90bc53475383cf08b3769ba9a97d09374ee3