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

[automerge] libstagefright: fix heap use after free issue 2p: 2bddcbdd 2p: a648552f am: d56cb24c am: 0e1a37ba am: 7778ff84 am: b910a22e

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



Change-Id: I8d152b0095921d50dd47b142c9d36aa146b39d1b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>