Retire FixedBuffer am: c57fe51f93 am: 546b6fea86 am: 13e9bc8fcc

Original change: https://googleplex-android-review.googlesource.com/c/device/generic/goldfish-opengl/+/11444227

Change-Id: I014d15e5cc3299a3f277a9ea3c8fd169432f3c4f