PASS sender.getParameters() should return sendEncodings set by addTransceiver()
PASS setParameters() with modified encoding.active should succeed with RTCRtpTransceiverInit
PASS setParameters() with modified encoding.active should succeed without RTCRtpTransceiverInit
PASS setParameters() with modified encoding.priority should succeed with RTCRtpTransceiverInit
PASS setParameters() with modified encoding.priority should succeed without RTCRtpTransceiverInit
PASS setParameters() with modified encoding.networkPriority should succeed with RTCRtpTransceiverInit
PASS setParameters() with modified encoding.networkPriority should succeed without RTCRtpTransceiverInit