There doesn't seem to be any tests currently running with
VideoToolbox H.264 codec.
Add a minimal test to make sure there are no regressions.
Bug: webrtc:13934
Change-Id: I664833d06e9b4f919b0662781891f5448e6057c0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/257922
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Cr-Commit-Position: refs/heads/main@{#36511}