Fix issue where the solution is not updated when the grid is empty

Test: Manually move widgets and shortcuts around and the position should match the animation
Fix: 259502044
Change-Id: I20a98f9366394c840bb3cd0577de26a181a229ac
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 517bbf8..191d063 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -2385,6 +2385,9 @@
         ItemInfo item = d.dragInfo;
         final View child = (mDragInfo == null) ? null : mDragInfo.cell;
         if (!nearestDropOccupied) {
+            mDragTargetLayout.performReorder((int) mDragViewVisualCenter[0],
+                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY, item.spanX, item.spanY,
+                    child, mTargetCell, new int[2], CellLayout.MODE_SHOW_REORDER_HINT);
             mDragTargetLayout.visualizeDropLocation(mTargetCell[0], mTargetCell[1],
                     item.spanX, item.spanY, d);
         } else if ((mDragMode == DRAG_MODE_NONE || mDragMode == DRAG_MODE_REORDER)