Fix NuMediaExtractor::readSampleData buffer Handling am: 84c69bca81 am: c2c615137b am: 63e84ef13d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/22348680

Change-Id: If449e6ce2dbd0f72df3ea6ef92b5193cbaeec5b8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>