Cancelling the current drag when customization filter type changes to prevent crashes.

Change-Id: Iaa3f2598325950769d38ad1d6e390ab06ea194d7
diff --git a/src/com/android/launcher2/CustomizePagedView.java b/src/com/android/launcher2/CustomizePagedView.java
index ec9d52e..d2edd38 100644
--- a/src/com/android/launcher2/CustomizePagedView.java
+++ b/src/com/android/launcher2/CustomizePagedView.java
@@ -312,6 +312,7 @@
 
     public void setCustomizationFilter(CustomizationType filterType) {
         mCustomizationType = filterType;
+        cancelDragging();
         if (getChildCount() > 0) {
             setCurrentPage(0);
             updateCurrentPageScroll();