Merge "Adds fuzzer for MediaWriter and FrameDecoder" am: cbfdfe0d86 am: 3df11ed563 am: a83c516ead

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1363817

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic53b326c0744578d337008a9cbbb6c3b2dd137e8