Implement PhabricatorProjectInterface on Almanac Services and Devices

Summary:
Ref T5833. Allow services and devices to be tagged with projects.

(These fluff apply implementations are a good example of the issue discussed in T6403.)

Test Plan:

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5833

Differential Revision: https://secure.phabricator.com/D10782