Making ReorderWidget test more reliable

In some cases when starting to drag you can go to the next
CellLayout wich end in an error. Now the dragging functions
will move the item to the desired CellLayout no matter what
CellLayout you start in.

Fix: 266116487
Test: atest ReorderWidgets
Change-Id: Ie3ad2ff88f734856e2c66d5d51b7578482877b5a