Merge "Remove background scrim when there are no top insets." into ub-launcher3-dorval

src/com/android/launcher3/dragndrop/DragLayer.java

@@ -448,6 +448,12 @@ public class DragLayer extends InsettableFrameLayout {
         return isContainerOpen || mDragController.dispatchUnhandledMove(focused, direction);
     }
 
+    @Override
+    public void setInsets(Rect insets) {
+        super.setInsets(insets);
+        setBackgroundResource(insets.top == 0 ? 0 : R.drawable.workspace_bg);
+    }
+
     @Override
     public LayoutParams generateLayoutParams(AttributeSet attrs) {
         return new LayoutParams(getContext(), attrs);