We shouldn't treat VP9 simulcast {active,inactive,inactive} different
from VP9 singlecast when it comes to bitrates, so the condition
`config.simulcast_layers.size() <= 1` is updated to
`video_codec.numberOfSimulcastStreams <= 1` which holds true in the
"single active stream" case as well.
This is consistent with existing logic, such as the fact that we use
`SvcRateAllocator` instead of `SimulcastRateAllocator` when
`numberOfSimulcastStreams <= 1`.
Bug: webrtc:15061
Change-Id: I67fc78b9c0f97f1d607c91bbc689b06c3fd5cb48
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/298920
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39791}
9bbd9598b8