Provider:
* Move UI (e.g. separator) out of provider, create it entirely in adapter
* Remove timestamp based disambiguation (TODO throttling some other way)
* Add cursor "extras" to report total # of results on server
UI:
* Rewrite background-foreground threading to be more efficient and
signal changes back to UI by calling notifyDataSetChanged())
* Separator strings per Rich's UI (not using real strings yet)
* Remove link back to AutoCompleteTextView
NOTE: There's a bug in ACTV that is causing the window size not to
change properly on notifyDataSetChanged(). Framework team to investigate.
Bug: 2249514
Change-Id: I183b200dcdaa268f0612d2de6442db28e1491d40
