Merge "Fix potential overflow in WAV extractor" into qt-dev am: ee5995f8b2 am: 1bf5a0d43c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/12978101

Change-Id: I4055774d894aeebee1ab3fb2ec729b566ba8edb9