Conduit - return primary email if its verified in user methods

Summary: Ref T7263. We need this in the oauth case and otherwise it makes sense to include.

Test Plan: used the conduit console and saw my email address included in the results!

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7263

Differential Revision: https://secure.phabricator.com/D11791