ExternalBrowser: reset player for unlabelled media

Some browsers won't prefix intent types with "video", if a video is
already playing in background, it will play the new video in background.
Because of this, it is safer to stop the player, causing 'isPlaying' to
go false in playIndex(...) and not keeping the previous state.

application/vlc-android/src/org/videolan/vlc/StartActivity.kt

@@ -291,7 +291,13 @@ class StartActivity : FragmentActivity() {
             }
             intent.data?.authority == getString(R.string.tv_provider_authority) -> MediaUtils.openMediaNoUiFromTvContent(this@StartActivity, intent.data)
             intent.data?.authority == "skip_to" -> PlaybackService.instance?.playIndex(intent.getIntExtra("index", 0))
-            else -> withContext(Dispatchers.IO) { FileUtils.getUri(intent.data)}?.let { MediaUtils.openMediaNoUi(it) }
+            else -> withContext(Dispatchers.IO) { FileUtils.getUri(intent.data)}?.let {
+                // Some media might not be properly labeled
+                // As the last option, it is safer to reset the player before playing any media
+                if (PlaybackService.instance?.isPlaying == true)
+                    PlaybackService.instance?.playlistManager?.player?.stop()
+                MediaUtils.openMediaNoUi(it)
+            }
         }
         finish()
     }