[automerge] libstagefright: fix heap use after free issue 2p: 2bddcbdd am:...

[automerge] libstagefright: fix heap use after free issue 2p: 2bddcbdd am: 55383b7c am: ede04005 am: 5910d09c am: d4a5833e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/20068332



Change-Id: I002416a36446a26cafdb45ad4b09bf397be90425
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>