Use player.getThumbnail() instead of field in VideoPlayerUi

app/src/main/java/org/schabi/newpipe/player/ui/VideoPlayerUi.java

@@ -109,7 +109,6 @@ public abstract class VideoPlayerUi extends PlayerUi
     private final Handler controlsVisibilityHandler = new Handler(Looper.getMainLooper());
     @Nullable private SurfaceHolderCallback surfaceHolderCallback;
     boolean surfaceIsSetup = false;
-    @Nullable private Bitmap thumbnail = null;
 
 
     /*//////////////////////////////////////////////////////////////////////////
@@ -385,9 +384,7 @@ public abstract class VideoPlayerUi extends PlayerUi
     @Override
     public void destroy() {
         super.destroy();
-        if (binding != null) {
-            binding.endScreen.setImageBitmap(null);
-        }
+        binding.endScreen.setImageDrawable(null);
         deinitPlayerSeekOverlay();
         deinitListeners();
     }
@@ -422,12 +419,10 @@ public abstract class VideoPlayerUi extends PlayerUi
     public void onBroadcastReceived(final Intent intent) {
         super.onBroadcastReceived(intent);
         if (Intent.ACTION_CONFIGURATION_CHANGED.equals(intent.getAction())) {
-            // When the orientation changed, the screen height might be smaller.
-            // If the end screen thumbnail is not re-scaled,
-            // it can be larger than the current screen height
-            // and thus enlarging the whole player.
-            // This causes the seekbar to be ouf the visible area.
-            updateEndScreenThumbnail();
+            // When the orientation changes, the screen height might be smaller. If the end screen
+            // thumbnail is not re-scaled, it can be larger than the current screen height and thus
+            // enlarging the whole player. This causes the seekbar to be out of the visible area.
+            updateEndScreenThumbnail(player.getThumbnail());
         }
     }
     //endregion
@@ -449,11 +444,10 @@ public abstract class VideoPlayerUi extends PlayerUi
     @Override
     public void onThumbnailLoaded(@Nullable final Bitmap bitmap) {
         super.onThumbnailLoaded(bitmap);
-        thumbnail = bitmap;
-        updateEndScreenThumbnail();
+        updateEndScreenThumbnail(bitmap);
     }
 
-    private void updateEndScreenThumbnail() {
+    private void updateEndScreenThumbnail(@Nullable final Bitmap thumbnail) {
         if (thumbnail == null) {
             // remove end screen thumbnail
             binding.endScreen.setImageDrawable(null);