Issue #3266746: Provide access to view rendered currencies

Closes #3266746

Went with adding entity permission provider to manage create/edit/delete/view permissions for currencies.

modules/price/src/Entity/Currency.php

@@ -18,6 +18,8 @@ use Drupal\Core\Config\Entity\ConfigEntityBase;
  *     plural = "@count currencies",
  *   ),
  *   handlers = {
+ *     "access" = "Drupal\entity\EntityAccessControlHandler",
+ *     "permission_provider" = "Drupal\entity\EntityPermissionProvider",
  *     "form" = {
  *       "add" = "Drupal\commerce_price\Form\CurrencyForm",
  *       "edit" = "Drupal\commerce_price\Form\CurrencyForm",