Pixel perfect work for phone contact editor

- Always show account header for raw contacts
- Align text fields and titles along the left margin
- Align spinners
- Use "Add new" as the default text if there's no value
in Event or Groups field yet
- Restyle account header
- Use primary/secondary colors everywhere
- Non-editable contact fixes: remove "not editable on
this device" and replace it with a toast when the
user clicks on the header, restyle item_read_only_field

Bug: 5097095

Change-Id: I94a6c91b05344028b64c62735fb4559f9944529d