New time zone picker page

- Show current selected region and time zone in a 2 rows.
  Defailed info of current selected time zone in footer
- Show option menu to switch to select UTC offset
- This picker will be changed to the default picker in a later CL

Bug: 73952488
Test: m RunSettingsRoboTests
Change-Id: Ia81bb022e1021369612f5bd60c2c1f4d08db2af8
(cherry picked from commit b7d588f3)