title: $setValidity not working
body: <p>I have a condition where if user enters either contact number or email form should be considered as valid, to make this work I tried to use $setValidity but is not working, below is my code:</p>
  
  <pre><code>if($scope.contact.contactNumber || $scope.contact.email) {
      $scope.addContactForm.contactNumber.$setValidity('required', false);
      $scope.addContactForm.email.$setValidity('required', false);
  
      // In console it will show invalid as true &amp; valid as false
      console.log('Scope:', $scope.addContactForm);
  }
  </code></pre>