Return the right radius to start reorder when dragging a Widget

Currently the radius is only one cell but in the case of a widget
we want the radius of the whole widget.

Fix: 255421400
Test: this case only happens when dagging comming from outside of the cell layuot in the corners dragging a widget
Change-Id: I3fe294d18283dbecb27df1a2d4748dd44db9b956
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 75d7b6b..f3ea626 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -941,7 +941,7 @@
         cellToRect(targetCell[0], targetCell[1], spanX, spanY, cellBoundsWithSpacing);
         cellBoundsWithSpacing.inset(-mBorderSpace.x / 2, -mBorderSpace.y / 2);
 
-        if (canCreateFolder(getChildAt(targetCell[0], targetCell[1]))) {
+        if (canCreateFolder(getChildAt(targetCell[0], targetCell[1])) && spanX == 1 && spanY == 1) {
             // Take only the circle in the smaller dimension, to ensure we don't start reordering
             // too soon before accepting a folder drop.
             int minRadius = centerPoint[0] - cellBoundsWithSpacing.left;
@@ -951,8 +951,9 @@
             return minRadius;
         }
         // Take up the entire cell, including space between this cell and the adjacent ones.
-        return (float) Math.hypot(cellBoundsWithSpacing.width() / 2f,
-                cellBoundsWithSpacing.height() / 2f);
+        // Multiply by span to scale radius
+        return (float) Math.hypot(spanX * cellBoundsWithSpacing.width() / 2f,
+                spanY * cellBoundsWithSpacing.height() / 2f);
     }
 
     public int getCellWidth() {