[RTCPeerConnection-insertable-streams-errors.https.html]
  [RTCRtpSender.createEncodedStream() throws if not requested in PC configuration]
    expected: FAIL

  [RTCRtpReceiver.createEncodedStream() throws if not requested in PC configuration]
    expected: FAIL

  [Enqueuing the same frame twice fails]
    expected: FAIL

