fixing dispose in lobby view (#629)

Author: Brazol

dogfooding/lib/screens/lobby_screen.dart

@@ -28,24 +28,21 @@ class _LobbyScreenState extends State<LobbyScreen> {
   RtcLocalCameraTrack? _cameraTrack;
 
   final _userAuthController = locator.get<UserAuthController>();
-  bool _isJoiningCall = false;
 
   void joinCallPressed() {
-    _isJoiningCall = true;
-
     var options = const CallConnectOptions();
 
     final cameraTrack = _cameraTrack;
     if (cameraTrack != null) {
       options = options.copyWith(
-        camera: TrackOption.provided(cameraTrack),
+        camera: TrackOption.enabled(),
       );
     }
 
     final microphoneTrack = _microphoneTrack;
     if (microphoneTrack != null) {
       options = options.copyWith(
-        microphone: TrackOption.provided(microphoneTrack),
+        microphone: TrackOption.enabled(),
       );
     }
 
@@ -54,11 +51,8 @@ class _LobbyScreenState extends State<LobbyScreen> {
 
   @override
   void dispose() {
-    // Dispose tracks if we closed lobby screen without joining the call.
-    if (!_isJoiningCall) {
-      _cameraTrack?.stop();
-      _microphoneTrack?.stop();
-    }
+    _cameraTrack?.stop();
+    _microphoneTrack?.stop();
 
     _cameraTrack = null;
     _microphoneTrack = null;

packages/stream_video_flutter/lib/src/call_screen/lobby_view.dart

@@ -56,7 +56,6 @@ class _StreamLobbyViewState extends State<StreamLobbyView> {
   RtcLocalCameraTrack? _cameraTrack;
   List<CallParticipant> _participants = <CallParticipant>[];
   Map<String, CallUser> _users = <String, CallUser>{};
-  bool _isJoiningCall = false;
 
   StreamSubscription<Object>? _fetchSubscription;
   StreamSubscription<Object>? _eventSubscription;
@@ -94,7 +93,6 @@ class _StreamLobbyViewState extends State<StreamLobbyView> {
   }
 
   void onJoinCallPressed() {
-    _isJoiningCall = true;
     var options = const CallConnectOptions();
 
     if (hasCameraEnabled) {
@@ -121,11 +119,8 @@ class _StreamLobbyViewState extends State<StreamLobbyView> {
 
   @override
   void dispose() {
-    // Dispose tracks if we closed lobby screen without joining the call.
-    if (!_isJoiningCall) {
-      _cameraTrack?.stop();
-      _microphoneTrack?.stop();
-    }
+    _cameraTrack?.stop();
+    _microphoneTrack?.stop();
 
     _cameraTrack = null;
     _microphoneTrack = null;