Improve implementation of ManiphestTaskQuery

Summary:
Currently, we have a single `projectPHIDs` field, and a separate flag which makes it act like AND or OR.

This is silly. Make two separate methods for setting `AND` vs `OR` projects. This also simplifies the implmentation.

This doesn't change the UI or any behavior (yet), it just makes the API more usable.

Test Plan: Loaded homepage, "All Projects" task view, verified queries made sense and returned correct results. Grepped for changed method name.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1610

Differential Revision: https://secure.phabricator.com/D3630

src/applications/project/controller/PhabricatorProjectListController.php

@@ -84,8 +84,7 @@ final class PhabricatorProjectListController
     $groups = array();
     if ($project_phids) {
       $query = id(new ManiphestTaskQuery())
-        ->withProjects($project_phids)
-        ->withAnyProject(true)
+        ->withAnyProjects($project_phids)
         ->withStatus(ManiphestTaskQuery::STATUS_OPEN)
         ->setLimit(PHP_INT_MAX);