b3750133db
While it is valid to request focus while detached from a window, AbsListView did not handle it gracefully if it had an adapter whose data changed while the view was detached, since DataSetObservers are unregistered during this time. Assume that the data could have changed if we gain focus while detached. Change-Id: Id135693ffcc48ff5a9d530d335ab449180624c43