Merge "C2SoftVpxEnc: Add support for encoding from a larger graphic block" into rvc-dev am: 9bc5afbdfe am: b29e093119 am: 58c2a223e5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/11813589

Change-Id: I453a8c63ca2c5da067bdb569fd0afe92a4a81bb4