Improving transition between Apps/Widgets panes (5145408)

Change-Id: Id4f73a89b646bbf168ee49e8bdeb34b85a52d9d4
diff --git a/res/layout/apps_customize_pane.xml b/res/layout/apps_customize_pane.xml
index 05e7fc1..95b7dc2 100644
--- a/res/layout/apps_customize_pane.xml
+++ b/res/layout/apps_customize_pane.xml
@@ -63,6 +63,11 @@
                 launcher:widgetCountX="@integer/apps_customize_widget_cell_count_x"
                 launcher:widgetCountY="@integer/apps_customize_widget_cell_count_y"
                 launcher:maxGap="@dimen/workspace_max_gap" />
+            <ImageView
+                android:id="@+id/animation_buffer"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:visibility="gone" />
 
             <include
                 android:id="@+id/paged_view_indicator"