Use CenterCropBitmapTask for theme wallpapers

Instead of just scaling the image, use CenterCropBitmapTask
which scales and crops the image so that it's not distorted
as much.

Fixes: 139828164
Change-Id: Ic5649e3dc031c20365f250e1ed988708a905c666
diff --git a/src/com/android/customization/picker/theme/ThemeFragment.java b/src/com/android/customization/picker/theme/ThemeFragment.java
index f584dec..e4682bb 100644
--- a/src/com/android/customization/picker/theme/ThemeFragment.java
+++ b/src/com/android/customization/picker/theme/ThemeFragment.java
@@ -23,6 +23,7 @@
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.Bitmap.Config;
+import android.graphics.Matrix;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.LayerDrawable;
@@ -61,6 +62,7 @@
 import com.android.customization.widget.PreviewPager;
 import com.android.wallpaper.R;
 import com.android.wallpaper.asset.Asset;
+import com.android.wallpaper.asset.Asset.CenterCropBitmapTask;
 import com.android.wallpaper.model.WallpaperInfo;
 import com.android.wallpaper.module.CurrentWallpaperInfoFactory;
 import com.android.wallpaper.module.InjectorProvider;
@@ -552,7 +554,9 @@
                     if (wallpaperPreviewAsset != null) {
                         wallpaperPreviewAsset.decodeBitmap(
                                 targetWidth, targetHeight,
-                                bitmap -> setWallpaperBitmap(view, bitmap));
+                                bitmap -> new CenterCropBitmapTask(bitmap, view,
+                                        croppedBitmap -> setWallpaperBitmap(view, croppedBitmap))
+                                .execute());
                     }
                     view.removeOnLayoutChangeListener(this);
                 }