[automerge] Fix Out of Bounds Read in AAVCAssembler 2p: 3066b1410d am: 5a884e0659 am: 17aac56edd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/20540194

Change-Id: Ida9eeb7ba48425e48f29db403dc455f747cdda55
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>