Editor name fields

The mocks show all name fields collapsed into a single field.
After deeper inspection, this proved to be poor UX. Instead
we show the three name types inside a single name section.

Screenshot: go/ba_screen_captures/contacts/b18004959_edit_screen_material/name_fields.png

Bug: 18004959
Change-Id: Ic06abcd151a64746cce32832b27e8f47ec6b981d