BurstyPacer is currently controlled via field trials. In order for Chrome to be able to have burst without relying on a field trial, this parameter is added. When all burst experiments have concluded we may be able to have a hardcoded constant instead, but for now the parameter is added to RTCConfiguration. NOTRY=True Bug: chromium:1354491 Change-Id: I386c1651dbbcbf309c15ea3d3380cf8f632b5429 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/283420 Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Henrik Boström <hbos@webrtc.org> Cr-Commit-Position: refs/heads/main@{#38621}