Ensuring that we don't start dragging while another drag is in progress.

Change-Id: If3c5a059407efc3ee9a0c9b1b3b7fb942d3a7664
diff --git a/src/com/android/launcher2/DragController.java b/src/com/android/launcher2/DragController.java
index 0f24cd9..b456030 100644
--- a/src/com/android/launcher2/DragController.java
+++ b/src/com/android/launcher2/DragController.java
@@ -390,6 +390,10 @@
         return mDragging;
     }
 
+    public boolean isDragging() {
+        return mDragging;
+    }
+
     /**
      * Stop dragging without dropping.
      */