This CL adds tracking of packet feedback availability in the
BitrateAllocator class.
This is part of a series of CLs tracking the transport feedback status
of the streams known to BitrateAllocator and reporting the status to
the congestion controller.
Bug: webrtc:8415
Change-Id: Ie46d7040494ba116928d791a8e4c5dae6992cafc
Reviewed-on: https://webrtc-review.googlesource.com/63202
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22534}
29b204ede8