Merge "Added writer fuzzers" am: 5edfd27206 am: c06a38dd69

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1533163

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4e8b33019cdc1b6a43c51cd92a1dced7f5a655a4