User can now enable auto-time but disable auto-timezone, especially
if we don't have NITZ time from the cell network (or wifi only)
and only have NTP time that gives us date and time.
- remove old ZonePicker and rename ZoneList to ZonePicker, as
the name is really confusing (see LocalePicker)
- Make the new ZonePicker fragment.
- remove dependency toward "ZoneList" class.
-- AndroidManifest.xml does not allow the other components to
access ZoneList directly, so it would be ok to remove without
using activity-alias.
-- Noticed there is a significant code duplication between
DateTimeSettings and DateTimeSettingsActivity. I'll work on it
later.
- add DateTimeSettingsSetupWizardXL class, which is not used yet,
but will be in the near future.
-- It is not recognized by AndroidManifest.xml
Change-Id: Id26152a3d560f9e0bd84afdf3e1c5101f0e166b4
