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/UninstallDropTarget.java b/src/com/android/launcher3/UninstallDropTarget.java
index 0fac29f..45c14d6 100644
--- a/src/com/android/launcher3/UninstallDropTarget.java
+++ b/src/com/android/launcher3/UninstallDropTarget.java
@@ -28,10 +28,13 @@
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
+        setupUi();
+    }
+
+    protected void setupUi() {
         // Get the hover color
         mHoverColor = getResources().getColor(R.color.uninstall_target_hover_tint);
-
-        setDrawable(R.drawable.ic_uninstall_launcher);
+        setDrawable(R.drawable.ic_uninstall_shadow);
     }
 
     @Override