If allow_bandwidht_estimation_probe_without_media is true and a writable
video rtp stream with RTX exist, a probe can be sent immediately without
waiting for a large media packet.
Bug: webrtc:14928
Change-Id: Ie2204734f9fe3e6bff9aed4a1f7f8995956d35cb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/336000
Commit-Queue: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41626}
98db63cfb6