This ensures that SendSideCongestionController is always initialized
with starting bitrate and bitrate limits.
Bug: webrtc:8415
Change-Id: If3b75e935dda755f9e0f40af1021f97ff150c9e9
Reviewed-on: https://webrtc-review.googlesource.com/59224
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22370}