Replace use of java.util.HashMap with android.util.ArrayMap

in DrawableFactory.

Change-Id: I4ab7f908c3e8768762942ca83f576197dfea66d6
Bug: 62466540

src/com/android/launcher3/graphics/DrawableFactory.java

@@ -28,16 +28,14 @@ import android.graphics.drawable.Drawable;
 import android.os.Process;
 import android.os.UserHandle;
 import android.support.annotation.UiThread;
+import android.util.ArrayMap;
 import android.util.Log;
-
 import com.android.launcher3.FastBitmapDrawable;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.allapps.AllAppsBackgroundDrawable;
 
-import java.util.HashMap;
-
 /**
  * Factory for creating new drawables.
  */
@@ -61,7 +59,7 @@ public class DrawableFactory {
     }
 
     protected final UserHandle mMyUser = Process.myUserHandle();
-    protected final HashMap<UserHandle, Bitmap> mUserBadges = new HashMap<>();
+    protected final ArrayMap<UserHandle, Bitmap> mUserBadges = new ArrayMap<>();
 
     /**
      * Returns a FastBitmapDrawable with the icon.