Fixing issue where flinging the Customize tray would scroll to the incorrect page after update.

Change-Id: I654665b065ad60414286ea16f7feae5054df604c
diff --git a/src/com/android/launcher2/CustomizePagedView.java b/src/com/android/launcher2/CustomizePagedView.java
index b997275..2f2cb24 100644
--- a/src/com/android/launcher2/CustomizePagedView.java
+++ b/src/com/android/launcher2/CustomizePagedView.java
@@ -1109,7 +1109,14 @@
         }
 
         // bound the current page
-        setCurrentPage(Math.max(0, Math.min(childCount - 1, getCurrentPage())));
+        requestLayout();
+        post(new Runnable() {
+            @Override
+            public void run() {
+                setCurrentPage(Math.max(0, Math.min(childCount - 1, getCurrentPage())));
+                forceUpdateAdjacentPagesAlpha();
+            }
+        });
     }
 
     @Override