add more freezed states

lib/main.dart

@@ -79,10 +79,10 @@ Future<void> main() async {
       },
     ),
     BlocProvider(
-      create: (context) => PlayerCubit(PlayerState(), context.read<SettingsCubit>()),
+      create: (context) => PlayerCubit(PlayerState.init(null), context.read<SettingsCubit>()),
     ),
     BlocProvider(
-      create: (context) => DownloadManagerCubit(DownloadManagerState(), context.read<PlayerCubit>()),
+      create: (context) => DownloadManagerCubit(const DownloadManagerState(), context.read<PlayerCubit>()),
     )
   ], child: const MyApp()));
 }

lib/player/models/mediaCommand.dart

@@ -15,10 +15,10 @@ enum MediaCommandType {
 }
 
 class MediaCommand<T> {
-  MediaCommandType type;
-  T? value;
+ final MediaCommandType type;
+ final T? value;
 
-  MediaCommand(this.type, {this.value});
+  const MediaCommand(this.type, {this.value});
 }
 
 class SwitchVideoValue {

lib/player/models/mediaEvent.dart

@@ -1,9 +1,9 @@
 class MediaEvent<T> {
-  MediaEventType? type;
-  MediaState state;
-  T? value;
+ final  MediaEventType? type;
+ final  MediaState state;
+ final  T? value;
 
-  MediaEvent({this.type, required this.state, this.value});
+ const MediaEvent({this.type, required this.state, this.value});
 }
 
 enum MediaEventType {