feat: 支持不开启后台播放时的音频打断 支持有通知是减小音量通知结束时回复

lib/services/service_locator.dart

@@ -1,8 +1,11 @@
 import 'audio_handler.dart';
+import 'audio_session.dart';
 
 late VideoPlayerServiceHandler videoPlayerServiceHandler;
+late AudioSessionHandler audioSessionHandler;
 
 Future<void> setupServiceLocator() async {
   final audio = await initAudioService();
   videoPlayerServiceHandler = audio;
+  audioSessionHandler = AudioSessionHandler();
 }