Introducing the notion of "verified name" on a raw contact.

This flag can be set by a sync adapter if it is certain that the
name is correct (a social network sync adapter would be a good example
of this).  It can also be explicitly set by the user in the Contact
Edit UI.

Bug: 2164422
Change-Id: Id46e04c28eeb0dc386adfc6ad8988dda50824e2b