Reporting packet feedback availability in VideoSendStream
Reporting packet feedback availability in VideoSendStream

This CL adds tracking and reporting of packet feedback availability in
the VideoSendStream 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: I4e7b6d5b034b4ae1e86ea439e6d001eea04784ce
Reviewed-on: https://webrtc-review.googlesource.com/63204
Reviewed-by: Erik Språng <3ab8c90c99d6dd7822e0fad803ab0211dd287ae5@webrtc.org>
Commit-Queue: Sebastian Jansson <c24d1bc144eb7c11e553f59153fa17dba85ca83e@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#22545}
ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc