PlainRtpTransport: fix comedia mode
PlainRtpTransport: fix comedia mode

versatica/mediasoup,ibc/MediaSoup,versatica/mediasoup,versatica/mediasoup,versatica/mediasoup,versatica/mediasoup,versatica/mediasoup,ibc/MediaSoup,versatica/mediasoup,ibc/MediaSoup,versatica/mediasoup,versatica/mediasoup