Add check for suspiciously low bitrate of the layer #1439
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If WebRTC client's uplink is bad to a degree that encoder periodically sends packets of the higher spatial layer but it is not enough for stable playback it leads to a situation when higher layer keyframe switches the stream however no packets are sent afterwards and picture freezes until the next keyframe appears instead of keep on sending stable lower layer stream.
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If WebRTC client's uplink is bad to a degree that encoder periodically sends packets
of the higher spatial layer but it is not enough for stable playback it leads to a situation
when higher layer keyframe switches the stream however no packets are sent afterwards
and picture freezes until the next keyframe appears instead of keep on sending stable lower layer stream.
This PR is a replace for PR#1427.