Apply BitmapCachingAsset for WallpaperColorsLoader to use the catched bitmap

The catch map: https://source.corp.google.com/android/packages/apps/WallpaperPicker2/src/com/android/wallpaper/asset/BitmapCachingAsset.java;l=65?q=package:%5E(android)$%20file:(%2F%7C%5E)com%2Fandroid%2Fwallpaper%2Fasset%2FBitmapCachingAsset%5C.java$

Test: Manually
Bug: 146475648
Change-Id: I8427838d186c4e48b53e721d6cdcc72d0384eb5e
diff --git a/src/com/android/wallpaper/picker/CategoryFragment.java b/src/com/android/wallpaper/picker/CategoryFragment.java
index a17263e..5cb858d 100755
--- a/src/com/android/wallpaper/picker/CategoryFragment.java
+++ b/src/com/android/wallpaper/picker/CategoryFragment.java
@@ -687,6 +687,7 @@
             }
 
             WallpaperColorsLoader.getWallpaperColors(
+                    getContext(),
                     wallpaperInfo.getThumbAsset(getContext()),
                     thumbnailView.getMeasuredWidth(),
                     thumbnailView.getMeasuredHeight(),
diff --git a/src/com/android/wallpaper/widget/WallpaperColorsLoader.java b/src/com/android/wallpaper/widget/WallpaperColorsLoader.java
index 5ea5c15..22d1ab2 100644
--- a/src/com/android/wallpaper/widget/WallpaperColorsLoader.java
+++ b/src/com/android/wallpaper/widget/WallpaperColorsLoader.java
@@ -16,12 +16,14 @@
 package com.android.wallpaper.widget;
 
 import android.app.WallpaperColors;
+import android.content.Context;
 import android.graphics.Bitmap;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
 
 import com.android.wallpaper.asset.Asset;
+import com.android.wallpaper.asset.BitmapCachingAsset;
 
 /** A class to load the {@link WallpaperColors} from wallpaper {@link Asset}. */
 public class WallpaperColorsLoader {
@@ -39,9 +41,10 @@
     }
 
     /** Gets the {@link WallpaperColors} from the wallpaper {@link Asset}. */
-    public static void getWallpaperColors(@NonNull Asset asset, int targetWidth, int targetHeight,
+    public static void getWallpaperColors(Context context, @NonNull Asset asset,
+                                          int targetWidth, int targetHeight,
                                           @NonNull Callback callback) {
-        asset.decodeBitmap(targetWidth, targetHeight, bitmap -> {
+        new BitmapCachingAsset(context, asset).decodeBitmap(targetWidth, targetHeight, bitmap -> {
             if (bitmap != null) {
                 boolean shouldRecycle = false;
                 if (bitmap.getConfig() == Bitmap.Config.HARDWARE) {