Fix old remaining i18n bugs on TimePicker:

- put am/pm on the left side of hours for hu, zh, ja and ko Locales
- use the hours/minutes separator from the Locale (fi, sr, ...)
- updated layouts (better for Arabic, Farsi and Hebrew)
- support double digits format for 12h and single digit format for
24h (it, ja, vi, ...)
- fix setIs24HourView(boolean) behavior: do not lose the current hour
value when switching from 12h to 24h

Change-Id: If66cb6f802d894f0a2357b43eede6854791f3b67