Provide PhabricatorSavedQuery to renderResultsList()

Summary: This allows the SavedQuery to modify what the result list looks like (e.g., include display flags and similar).

Test Plan: Looked at some ApplicationSearch apps.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2625

Differential Revision: https://secure.phabricator.com/D6346