Fixing wrong check to determine the drag source

> target it the drop target, i.e., the InfoDropTarget or DeleteDropTarget

Change-Id: If4a9f8eb72ee6afb4d80c7df6f0f2ada4bc35b22
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 1ad8b27..ab6ebd3 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -3206,7 +3206,7 @@
     /**
      * Returns the CellLayout of the specified container at the specified screen.
      */
-    CellLayout getCellLayout(long container, long screenId) {
+    public CellLayout getCellLayout(long container, long screenId) {
         if (container == LauncherSettings.Favorites.CONTAINER_HOTSEAT) {
             if (mHotseat != null) {
                 return mHotseat.getLayout();