fix(flutter): 调整播放页底部信息排版

lib/l10n/app_localizations_zh.dart

@@ -131,6 +131,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get showLess => '收起';
 
+  @override
+  String get expandSynopsis => '展开';
+
   @override
   String get views => '次播放';