Clearing workspace screen data structures along with pages.

Change-Id: Ib6c4522cd0c0c06dd6fd327be3621a6de0778f9c
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 943deda..dd9e793 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -3501,7 +3501,7 @@
 
         // Clear the workspace because it's going to be rebound
         mWorkspace.clearDropTargets();
-        mWorkspace.removeAllViews();
+        mWorkspace.removeAllWorkspaceScreens();
 
         mWidgetsToAdvance.clear();
         if (mHotseat != null) {