Connection quality (#27)

* update protos

* signal event

* implemented

* format

* implement example

* protocol 5

* icon size

lib/src/room.dart

@@ -174,6 +174,8 @@ class Room extends DisposableChangeNotifier with EventsEmittable<RoomEvent> {
         (event) => _onEngineActiveSpeakersUpdateEvent(event.speakers))
     ..on<SignalSpeakersChangedEvent>(
         (event) => _onSignalSpeakersChangedEvent(event.speakers))
+    ..on<SignalConnectionQualityUpdateEvent>(
+        (event) => _onSignalConnectionQualityUpdateEvent(event.updates))
     ..on<EngineDataPacketReceivedEvent>(_onDataMessageEvent)
     ..on<EngineRemoteMuteChangedEvent>((event) async {
       final track = localParticipant.trackPublications[event.sid];
@@ -366,6 +368,23 @@ class Room extends DisposableChangeNotifier with EventsEmittable<RoomEvent> {
     events.emit(ActiveSpeakersChangedEvent(speakers: activeSpeakers));
   }
 
+  void _onSignalConnectionQualityUpdateEvent(
+      List<lk_rtc.ConnectionQualityInfo> updates) {
+    for (final entry in updates) {
+      Participant? participant;
+      if (entry.participantSid == localParticipant.sid) {
+        participant = localParticipant;
+      } else {
+        participant = _participants[entry.participantSid];
+      }
+
+      if (participant != null) {
+        // update the connection quality if the participant is found
+        participant.updateConnectionQuality(entry.quality.toLKType());
+      }
+    }
+  }
+
   void _onDataMessageEvent(EngineDataPacketReceivedEvent dataPacketEvent) {
     // participant may be null if data is sent from Server-API
     final senderSid = dataPacketEvent.packet.participantSid;