Started Room, publisher negotiation, add RTCRuntime dependencies across webrtc instances

crates/livekit-webrtc/src/peer_connection.rs

@@ -25,6 +25,7 @@ pub struct PeerConnection {
     observer: Box<InternalObserver>,
 
     // Keep alive for C++
+    #[allow(unused)]
     native_observer: UniquePtr<sys_pc::ffi::NativePeerConnectionObserver>,
 }
 
@@ -174,6 +175,10 @@ impl PeerConnection {
         self.cxx_handle.ice_gathering_state()
     }
 
+    pub fn ice_connection_state(&self) -> IceConnectionState {
+        self.cxx_handle.ice_connection_state()
+    }
+
     pub fn close(&mut self) {
         self.cxx_handle.pin_mut().close();
     }