[Regional Preference] Create each page for regional preferences

 - Temperature unit
 - Calendar type
 - First day of week

Bug: b/246929960
Bug: b/247072550
Bug: b/247071792
Bug: b/247071572
Test: atest passed
Test: Manual test passed

Change-Id: Iea093588da33b352b5e7bfa5c483659e7afb8296