Conduit APIs to start and stop tracking time in phrequent
This adds methods to start and stop tracking any arbitrary PHID in phrequent. Currently, this uses copy-pasted code from PhrequentTrackController. I had to do this because the code to start/stop was not abstracted into a common class.
Once the code to start/stop working is extracted into a re-usable class, the conduit API can use this as well.
Test Plan: I called the functions with a PHID of a task and ensured that the fields in the phrequent database table was being updated correctly.
Reviewers: skyronic, Blessed Reviewers, epriestley
Reviewed By: Blessed Reviewers, epriestley
Subscribers: maxhodak, erik.fercak, aran, epriestley, Korvin
Differential Revision: https://secure.phabricator.com/D7326