Test: Drag on the divider line.

Fix Bug:SystemUI will crash when draging the divider line in qstile edit panel.

Patch solution:The divider line can not be dragged.
When the divider is selected, step in onSelectedChanged, mTiles.get(position) will return null object.Then SystemUI will crash

Change-Id: I40b948a8fac2964df7891086a701159a4c0f513d
1 file changed