Subscriber as primary (#8)

* Update protos

* Signal client

* Improve transport

* First implementation

* Fix publish

* Update `PCTransport` for debounce negotiation

* debounce func

* reconnect & events

* Update debounce func

* engine events

* make sure events don't emit after dispose

* prefix flutter_webrtc

* Cleaner `iceServers` update

* don't mutate user provided params

* fix tests

* event manager

* Fix: `Room.onDisconnected` gets fired multiple times

* data publish in example

* cleaner logic

* safer events

* un-prefix with LK

* organize imports

* Clean up

* remove `Tuple`

* `EventsEmitter` can now be directly listened to

`EventsEmitter` extends `EventsListenable`

lib/src/track/track.dart

@@ -1,4 +1,4 @@
-import 'package:flutter_webrtc/flutter_webrtc.dart';
+import 'package:flutter_webrtc/flutter_webrtc.dart' as rtc;
 import 'package:uuid/uuid.dart';
 
 import '../proto/livekit_models.pb.dart' as lk_models;
@@ -17,24 +17,24 @@ class Track {
 
   String name;
   lk_models.TrackType kind;
-  MediaStreamTrack mediaStreamTrack;
+  rtc.MediaStreamTrack mediaStreamTrack;
   String? sid;
-  RTCRtpTransceiver? transceiver;
+  rtc.RTCRtpTransceiver? transceiver;
   String? _cid;
 
   Track(this.kind, this.name, this.mediaStreamTrack);
 
   bool get muted => mediaStreamTrack.muted == null ? false : mediaStreamTrack.muted!;
 
-  RTCRtpMediaType get mediaType {
+  rtc.RTCRtpMediaType get mediaType {
     switch (kind) {
       case lk_models.TrackType.AUDIO:
-        return RTCRtpMediaType.RTCRtpMediaTypeAudio;
+        return rtc.RTCRtpMediaType.RTCRtpMediaTypeAudio;
       case lk_models.TrackType.VIDEO:
-        return RTCRtpMediaType.RTCRtpMediaTypeVideo;
+        return rtc.RTCRtpMediaType.RTCRtpMediaTypeVideo;
       // this should never happen
       default:
-        return RTCRtpMediaType.RTCRtpMediaTypeAudio;
+        return rtc.RTCRtpMediaType.RTCRtpMediaTypeAudio;
     }
   }