Get the view's current title. This can change depending upon how it was built.
public function getTitle() {
  if (empty($this->display_handler)) {
    if (!$this
      ->setDisplay('default')) {
      return FALSE;
    }
  }
  // During building, we might find a title override. If so, use it.
  if (!empty($this->build_info['title'])) {
    $title = $this->build_info['title'];
  }
  else {
    $title = $this->display_handler
      ->getOption('title');
  }
  // Allow substitutions from the first row.
  if ($this
    ->initStyle()) {
    $title = $this->style_plugin
      ->tokenizeValue($title, 0);
  }
  return $title;
}