base

Don't give IME focus to temporarily detached View.

The root cause of Bug 18920212 is that when AutoCompleteTextView tries
to show completion window upon text input,
InputMethodManager#focusInLocked() can be called with a View that is
temporarily detached, which should be ignored.

Bug: 18920212
Change-Id: Ia79bbd8468f768d546354382b47b39dd31ef7bb5