Connection quality (#27)

* update protos

* signal event

* implemented

* format

* implement example

* protocol 5

* icon size

lib/src/signal_client.dart

@@ -24,7 +24,7 @@ class SignalClient extends Disposable with EventsEmittable<SignalEvent> {
   LiveKitWebSocket? _ws;
 
   SignalClient({
-    this.protocol = ProtocolVersion.protocol4,
+    this.protocol = ProtocolVersion.protocol5,
   }) {
     events.listen((event) {
       logger.fine('[SignalEvent] $event');
@@ -247,6 +247,11 @@ class SignalClient extends Disposable with EventsEmittable<SignalEvent> {
         events.emit(
             SignalSpeakersChangedEvent(speakers: msg.speakersChanged.speakers));
         break;
+      case lk_rtc.SignalResponse_Message.connectionQuality:
+        events.emit(SignalConnectionQualityUpdateEvent(
+          updates: msg.connectionQuality.updates,
+        ));
+        break;
       case lk_rtc.SignalResponse_Message.leave:
         events.emit(SignalLeaveEvent(canReconnect: msg.leave.canReconnect));
         break;