Improve search UX prior to load being finished.

Show a informative hint in that case.
Also clean up code somewhat.

Change-Id: I57f37bc60fbaef2ea0db0b0c3227df125b0e4ab9

Conflicts:

	src/com/android/settings/Settings.java
Settings: Bump SettingsSearch db version.

Change-Id: I0ba3be71f61fcae9c2fe67064b5f890fdd0abb2c
Check locale when populating DB instead of using separate receiver.

This makes reloading the search data race condition free. Previously,
when invoking search directly after the locale change, one would get the
results for the old or the new locale depending on timing between the
broadcast being delivered and the activity restart.

Change-Id: I35bc11a7f68e655e00fe53b829deea613da74f69