Include other types of fields that handle images.

The $field_type parameter is added to the formFieldConfigEditFormAlter() function.

How to use it?
In my module:

/**
  * Implements hook_form_FORM_ID_alter().
  */
function MYMODULE_form_field_config_edit_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  if (\Drupal::service('module_handler')->moduleExists('upload_image_changer')) {
    return \Drupal::service('upload_image_changer.hooks')->formFieldConfigEditFormAlter($form, $form_state, $form_id, 'myfield_image');
  }
}