media player: resume playing if playback was active; prevent from playback resume in background even if corresponding option is disabled in settings (should fix #9225)

VLC::pause works as toggle play/pause. If playback is paused already sequential Pause will lead to Play action

AspenProject/VLCMovieViewController.m

@@ -977,8 +977,10 @@
     _mediaPlayer.currentVideoTrackIndex = 0;
 
     if (![[[NSUserDefaults standardUserDefaults] objectForKey:kVLCSettingContinueAudioInBackgroundKey] boolValue]) {
-        [_mediaPlayer pause];
-        _shouldResumePlaying = YES;
+        if ([_mediaPlayer isPlaying]) {
+            [_mediaPlayer pause];
+            _shouldResumePlaying = YES;
+        }
     }
 
     glFinish();