CookieCategoryForm: DI EntityTypeManager

The EntityTypeManager is injected, but should be typehinted as EntityTypeManagerInterface.
Modules like Webprofiler also implement this interface.

This:

  /**
   * Constructs a CookieCategoryForm object.
   *
   * @param \Drupal\Core\Entity\EntityTypeManager $entityTypeManager
   *   The entityTypeManager.
   *
   * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
   * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
   */
  public function __construct(EntityTypeManager $entityTypeManager) {
    $this->entityTypeManager = $entityTypeManager;
    $this->categoryStorageManager = $entityTypeManager->getStorage('cookie_category');
  }

Should become:

  /**
   * Constructs a CookieCategoryForm object.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entityTypeManager
   *   The entityTypeManager.
   *
   * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
   * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
   */
  public function __construct(EntityTypeManagerInterface $entityTypeManager) {
    $this->entityTypeManager = $entityTypeManager;
    $this->categoryStorageManager = $entityTypeManager->getStorage('cookie_category');
  }

I have attached a patch below.
Please advise.