Update the "owner can always view/edit" policy exception rule

Summary: Fixes T13460. This rule vanished from the UI in D20165; update things so it returns to the UI.

Test Plan: {F7035134}

Maniphest Tasks: T13460

Differential Revision: https://secure.phabricator.com/D20917

src/applications/maniphest/policy/ManiphestTaskPolicyCodex.php

@@ -39,6 +39,15 @@ final class ManiphestTaskPolicyCodex
 
     $rules = array();
 
+    $rules[] = $this->newRule()
+      ->setCapabilities(
+        array(
+          PhabricatorPolicyCapability::CAN_VIEW,
+          PhabricatorPolicyCapability::CAN_EDIT,
+        ))
+      ->setDescription(
+        pht('The owner of a task can always view and edit it.'));
+
     $rules[] = $this->newRule()
       ->setCapabilities(
         array(

src/applications/maniphest/storage/ManiphestTask.php

@@ -358,10 +358,6 @@ final class ManiphestTask extends ManiphestDAO
     return false;
   }
 
-  public function describeAutomaticCapability($capability) {
-    return pht('The owner of a task can always view and edit it.');
-  }
-
 
 /* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */