Currently, a default max bitrate is determined within WebRtcVideoEngine,
which maxes out at 2.5Mbps - and that limits the max bitrate deteremined
by SvcConfig for resolutions above 720p.
This does not affect simulcast, as WebRtcVideoEngine already knows to
trust the rate allocation in simulcast.cc instead.
Bug: webrtc:14017
Change-Id: I0c310a6fd496e9e5a10eae45838900068aa1ae2d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/267160
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37370}
3afb8e2431