Fix method visibility for PhabricatorController subclasses

Summary: Ref T6822.

Test Plan: Visual inspection. These methods are only called from within `PhabricatorController` subclasses.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6822

Differential Revision: https://secure.phabricator.com/D11241

src/applications/project/controller/PhabricatorProjectListController.php

@@ -22,11 +22,11 @@ final class PhabricatorProjectListController
     return $this->delegateToController($controller);
   }
 
-  public function buildApplicationMenu() {
+  protected function buildApplicationMenu() {
     return $this->buildSideNavView(true)->getMenu();
   }
 
-  public function buildApplicationCrumbs() {
+  protected function buildApplicationCrumbs() {
     $crumbs = parent::buildApplicationCrumbs();
 
     $can_create = $this->hasApplicationCapability(