Fix long press after already moving off icon

When an icon is in the Hotseat and a user drags off from the icon,
but continues holding down, the icon gets a long press triggered
by the CheckLongPressHelper.

To fix this a check has been added on move events to see if the
point has moved outside the view and to cancel the long press
check callback if it has.

Bug: 13569451
Change-Id: Id175cdc220d70b5e9f8e492ed5a3cc7c3f11db10