Creating a custom drawable to customize shadow.

> Fixing DrapTargetBar set to visible (with alpha = 0) in the start
causing unnecessary draw

Bug: 37616877
Change-Id: Iaaff96099910f504f6e2f81c9376ddacde50ff6a
diff --git a/src/com/android/launcher3/DeleteDropTarget.java b/src/com/android/launcher3/DeleteDropTarget.java
index 9097ed2..975675a 100644
--- a/src/com/android/launcher3/DeleteDropTarget.java
+++ b/src/com/android/launcher3/DeleteDropTarget.java
@@ -40,7 +40,7 @@
         // Get the hover color
         mHoverColor = getResources().getColor(R.color.delete_target_hover_tint);
 
-        setDrawable(R.drawable.ic_remove_launcher);
+        setDrawable(R.drawable.ic_remove_shadow);
     }
 
     @Override