Merge "MPEG4Writer: Fix unsigned integer overflow" into main am: 5cb3691cb2 am: 9db11468b8

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3137374

Change-Id: I2cec2a306e5a9ba0d5719b9aa71cbb08eab38877
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>