Merge "Null check if renderer is null" into sc-v2-dev am: 31281969e6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16091797

Change-Id: Ic4d95eb6db481f282b9be56c40878b12241fd9fb

packages/SystemUI/src/com/android/systemui/ImageWallpaper.java

@@ -238,9 +238,7 @@ public class ImageWallpaper extends WallpaperService {
                 Bitmap bitmap = mMiniBitmap;
                 if (bitmap == null) {
                     mLocalColorsToAdd.addAll(regions);
-                    mRenderer.use(b -> {
-                        updateMiniBitmapAndNotify(b);
-                    });
+                    if (mRenderer != null) mRenderer.use(this::updateMiniBitmapAndNotify);
                 } else {
                     computeAndNotifyLocalColors(regions, bitmap);
                 }