Fix heap-use-after-free issue flagged by fuzzer test. am: 15b46d31 am: a2c38490

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/24296959



Change-Id: I7c99ff7b050e32297f42b9248b5d2c7467fafae1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>