Merge "Mpeg4Extractor: Fix flac parsing in mp4" am: 8952e8e6f8

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2098773

Change-Id: Iec8b0c1770f61cb6f58748c009faf68c18eb28d3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>