R1:c71cb944a428

Add edit methods for Almanac services and devices

Summary: See T12414. This just gets started; we still need edit endpoints for network interfaces and bindings.

Test Plan: Created some devices/services from the conduit UI.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D18605