title: Cannot start audio only connection on react-native-webrtc
body: <p>I’m using JsSIP and react-native-webrtc for audio only communication. I’ve managed to start session and get remote and local stream objects. Our SIP server converts voip calls to a normal phone call. I know I successfully start session because I can call my own phone number and answer it.</p>
  
  <p>Since I can’t use RTCView I can’t play audio. And since there is no audio transmitting, server gives a time out after a while and stops session, and phone hangs up. How can I start sending and receiving sound?</p>