RTC: Cover default track status
RTC: Cover default track status

ossrs/srs,ossrs/srs,ossrs/srs,ossrs/srs,winlinvip/srs,winlinvip/srs,winlinvip/srs,winlinvip/simple-rtmp-server,ossrs/srs,winlinvip/srs,winlinvip/srs,winlinvip/srs,ossrs/srs