Restore systematic media expand

vlc-android/src/org/videolan/vlc/media/PlaylistManager.kt

@@ -683,7 +683,10 @@ class PlaylistManager(val service: PlaybackService) : MediaWrapperList.EventList
                     if (isBenchmark) player.setPreviousStats()
                     if (nextIndex == -1) savePosition(true)
                 }
-                next()
+                launch(UI, CoroutineStart.UNDISPATCHED) {
+                    determinePrevAndNextIndices(true)
+                    next()
+                }
             }
             MediaPlayer.Event.EncounteredError -> {
                 service.showToast(service.getString(

vlc-android/src/org/videolan/vlc/util/Kextensions.kt

@@ -7,6 +7,7 @@ import android.support.v4.app.Fragment
 import android.support.v4.app.FragmentActivity
 import kotlinx.coroutines.experimental.CoroutineStart
 import kotlinx.coroutines.experimental.delay
+import org.videolan.libvlc.Media
 import java.io.File
 import java.net.URI
 import java.net.URISyntaxException
@@ -47,4 +48,7 @@ suspend fun retry (
     return block() // last attempt
 }
 
-fun uiStart() = if (Looper.getMainLooper() == Looper.myLooper()) CoroutineStart.UNDISPATCHED else CoroutineStart.DEFAULT
\ No newline at end of file
+fun uiStart() = if (Looper.getMainLooper() == Looper.myLooper()) CoroutineStart.UNDISPATCHED else CoroutineStart.DEFAULT
+
+fun Media?.canExpand() = this != null && (type == Media.Type.Directory || type == Media.Type.Playlist)
+