Media stream not established

There's an issue with SDP/media stream with iOS SDK.

Here's the SDP which sends the OpenWebRTCWebView on iOS simulator:

```

v=0
o=- 1457621193642351600 1 IN IP4 127.0.0.1
s=-
t=0 0
a=msid-semantic:WMS 4EzbTpBLazpky8tKTRmYejBliL4dK5RuyZdw
m=audio 51367 UDP/TLS/RTP/SAVPF 8
c=IN IP4 192.168.169.116
a=sendrecv
a=rtpmap:8 PCMA/8000
a=ssrc:2509185161 cname:nyBgeiubd33/6lnw
a=msid:4EzbTpBLazpky8tKTRmYejBliL4dK5RuyZdw FDxZ9bFzKCpErWf5RAMA3YyLbkyqUSQkQATt
a=ice-ufrag:07Ef
a=ice-pwd:5yrKm0vXiHu7sh0yR+qRVR
a=candidate:1 1 UDP 2013266431 192.168.169.116 51367 typ host
a=candidate:2 1 TCP 1019216383 192.168.169.116 9 typ host tcptype active
a=candidate:3 1 TCP 1015022079 192.168.169.116 50624 typ host tcptype passive
a=candidate:1 2 UDP 2013266430 192.168.169.116 56915 typ host
a=candidate:2 2 TCP 1019216382 192.168.169.116 9 typ host tcptype active
a=candidate:3 2 TCP 1015022078 192.168.169.116 50625 typ host tcptype passive
a=fingerprint:sha-256 07:06:6B:62:55:21:84:39:CF:6B:4C:DE:1A:5F:BB:19:87:5E:31:4C:EE:0E:FF:3F:A0:2C:B7:8C:CB:EE:60:DA
a=setup:active
```

Here's the SDP from same web app working correctly on the same machine with Chrome browser:

```
v=0
o=- 2936256010493683849 2 IN IP4 127.0.0.1
s=-
t=0 0
a=msid-semantic: WMS 2ilLSZRtoTH1ZK6y27a5KRZfHgKbpIFtWFIH
m=audio 49677 UDP/TLS/RTP/SAVPF 0 8 101
c=IN IP4 192.168.169.116
a=rtcp:64614 IN IP4 192.168.169.116
a=candidate:3906229402 1 udp 2122260223 192.168.169.116 49677 typ host generation 0
a=candidate:3906229402 2 udp 2122260222 192.168.169.116 64614 typ host generation 0
a=ice-ufrag:Rq/0qxudr5d54lsE
a=ice-pwd:9y+P9rQsz7ubWBmZdvYe3jAs
a=fingerprint:sha-256 0E:07:CE:48:48:7E:58:EB:FB:01:3A:11:B7:43:78:77:A4:96:B5:4A:46:F3:77:91:AC:63:44:97:52:07:4B:73
a=setup:active
a=mid:audio
a=sendrecv
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=ssrc:252403116 cname:fi4iEa+bZkOTkzSj
a=ssrc:252403116 msid:2ilLSZRtoTH1ZK6y27a5KRZfHgKbpIFtWFIH 7f37984d-8197-4de5-abf8-2178506016a7
a=ssrc:252403116 mslabel:2ilLSZRtoTH1ZK6y27a5KRZfHgKbpIFtWFIH
a=ssrc:252403116 label:7f37984d-8197-4de5-abf8-2178506016a7
```

The webrtc handling in web app is done by newest version of sip.js library.

Start by comparing the iOS simulator SDP with the working Chrome SDP and trace how the OpenWebRTCWebView handles the media negotiation. Check the web app's newest sip.js integration and the iOS SDK path; done means the media stream is established on iOS as it is in Chrome. No source file or test is named in the report.

Written by the indexing model from the issue text.