When playing an episode, always take the duration from the MP3 if ava…

…ilable. Fixes issue where duration in RSS may be very different to that of the actual MP3 once DAI had been applied.

lib/services/audio/default_audio_player_service.dart

@@ -872,9 +872,9 @@ class _DefaultAudioPlayerHandler extends BaseAudioHandler with SeekHandler {
     try {
       var duration = await _player.setAudioSource(source, initialPosition: start);
 
-      /// If we don't already have a duration and we have been able to calculate it from
-      /// beginning to fetch the media, update the current media item with the duration.
-      if (duration != null && (_currentItem!.duration == null || _currentItem!.duration!.inSeconds == 0)) {
+      /// As duration returned from the player library can be different from the duration in the feed - usually
+      /// because of DAI - if we have a duration from the player, use that.
+      if (duration != null) {
         _currentItem = _currentItem!.copyWith(duration: duration);
       }