Saves a language configuration that is attached to an entity type and bundle.
string $entity_type: A string representing the entity type.
string $bundle: A string representing the bundle.
array $values: An array holding the values to be saved having the following keys:
function language_save_default_configuration($entity_type, $bundle, $values = array()) {
config('language.settings')
->set(language_get_default_configuration_settings_key($entity_type, $bundle), array(
'langcode' => $values['langcode'],
'language_hidden' => $values['language_hidden'],
))
->save();
}