Fix NuMediaExtractor::readSampleData buffer Handling am: 84c69bca81 am: c2c615137b am: 63e84ef13d am: 9e14ac6b9f am: 14e71a39c2 am: 4505700377

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

Change-Id: I03e2598f23653a2b44e67d9b9ad22ecc6d095237
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>