Absent fps allocation imply single layer stream which confuses bitrate adjuster.
As a result bitrate adjuster turned off S0T1 and S0T2 layers for the L3T3 structure.
Bug: webrtc:12148
Change-Id: I5b3a7b44322f347f41dd8858b3d703827e69dd72
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/201384
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32952}