Migrate LobbyView to TrackOptions.enabled (#626)

* Lower the min Android target on example app

* Migrate LobbyView TrackOptions to enabled

Author: Nash0x7E2

packages/stream_video_flutter/example/android/app/build.gradle

@@ -47,7 +47,7 @@ android {
         applicationId "com.example.stream_video_flutter_example"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
-        minSdkVersion Math.max(flutter.minSdkVersion, 33)
+        minSdkVersion Math.max(flutter.minSdkVersion, 32)
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

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

@@ -61,8 +61,12 @@ class _StreamLobbyViewState extends State<StreamLobbyView> {
   StreamSubscription<Object>? _fetchSubscription;
   StreamSubscription<Object>? _eventSubscription;
 
+  bool get hasCameraEnabled => _cameraTrack != null;
+
+  bool get hasMicrophoneEnabled => _microphoneTrack != null;
+
   Future<void> toggleCamera() async {
-    if (_cameraTrack != null) {
+    if (hasCameraEnabled) {
       await _cameraTrack?.stop();
       return setState(() => _cameraTrack = null);
     }
@@ -76,7 +80,7 @@ class _StreamLobbyViewState extends State<StreamLobbyView> {
   }
 
   Future<void> toggleMicrophone() async {
-    if (_microphoneTrack != null) {
+    if (hasMicrophoneEnabled) {
       await _microphoneTrack?.stop();
       return setState(() => _microphoneTrack = null);
     }
@@ -91,20 +95,17 @@ class _StreamLobbyViewState extends State<StreamLobbyView> {
 
   void onJoinCallPressed() {
     _isJoiningCall = true;
-
     var options = const CallConnectOptions();
 
-    final cameraTrack = _cameraTrack;
-    if (cameraTrack != null) {
+    if (hasCameraEnabled) {
       options = options.copyWith(
-        camera: TrackOption.provided(cameraTrack),
+        camera: TrackOption.enabled(),
       );
     }
 
-    final microphoneTrack = _microphoneTrack;
-    if (microphoneTrack != null) {
+    if (hasMicrophoneEnabled) {
       options = options.copyWith(
-        microphone: TrackOption.provided(microphoneTrack),
+        microphone: TrackOption.enabled(),
       );
     }