Summary: Same as D6051, but for SavedQueries instead of NamedQueries. These are POLICY_PUBLIC because you need to know the hash to access them, and because we want to let users copy/paste query URLs. Ref T2625.
Test Plan: Saved a query, reused a saved query.
Reviewers: btrahan, blc
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2625
Differential Revision: https://secure.phabricator.com/D6054
