better type for TrackPublication param

lib/src/participant/remote_participant.dart

@@ -107,7 +107,7 @@ class RemoteParticipant extends Participant {
     }
 
     // create Track
-    final Track track;
+    final RemoteTrack track;
     if (pub.kind == lk_models.TrackType.AUDIO) {
       // audio track
       track = RemoteAudioTrack(pub.name, pub.source, stream, mediaTrack);

lib/src/publication/local_track_publication.dart

@@ -4,7 +4,6 @@ import '../internal/events.dart';
 import '../participant/local_participant.dart';
 import '../proto/livekit_models.pb.dart' as lk_models;
 import '../track/local.dart';
-import '../track/track.dart';
 import 'track_publication.dart';
 
 class LocalTrackPublication<T extends LocalTrack> extends TrackPublication {
@@ -17,7 +16,7 @@ class LocalTrackPublication<T extends LocalTrack> extends TrackPublication {
   LocalTrackPublication({
     required this.participant,
     required lk_models.TrackInfo info,
-    required Track track,
+    required T track,
   }) : super(info: info) {
     updateTrack(track);
     // register dispose func
@@ -28,7 +27,7 @@ class LocalTrackPublication<T extends LocalTrack> extends TrackPublication {
   }
 
   @override
-  Future<bool> updateTrack(Track? newValue) async {
+  Future<bool> updateTrack(covariant T? newValue) async {
     final didUpdate = await super.updateTrack(newValue);
 
     if (newValue != null) {

lib/src/publication/remote_track_publication.dart

@@ -51,7 +51,7 @@ class RemoteTrackPublication<T extends RemoteTrack> extends TrackPublication {
   RemoteTrackPublication({
     required this.participant,
     required lk_models.TrackInfo info,
-    Track? track,
+    T? track,
   }) : super(info: info) {
     // register dispose func
     onDispose(() async {
@@ -149,7 +149,7 @@ class RemoteTrackPublication<T extends RemoteTrack> extends TrackPublication {
 
   @internal
   @override
-  Future<bool> updateTrack(Track? newValue) async {
+  Future<bool> updateTrack(covariant T? newValue) async {
     final didUpdate = await super.updateTrack(newValue);
 
     // Only listen for visibility updates if video optimization is on