webrtc-pc

1e0d37af - Splitting apart RTCIceConnectionState and RTCIceTransportState.

Splitting apart RTCIceConnectionState and RTCIceTransportState. The fundamental state definitions, example state transitions, and non-normative state transition diagram now all move to the RTCIceTransportState section, and are defined in terms of RTCIceTransports instead of an "ICE Agent". The RTCIceConnectionState section now contains explicit rules for how multiple RTCIceTransport states are aggregated, similar to how the RTCPeerConnectionState is defined. So, situations that were previously ambiguous (such as "what if one transport is 'new' and the other is 'connected'?") are now well-defined.