Issue #2282153 by vijaycs85: Make all config.storage.active & ...

Issue #2282153 by vijaycs85: Make all config.storage.active &  config.storage.file services private.

core/core.services.yml

@@ -96,10 +96,12 @@ services:
   config.storage.active:
     class: Drupal\Core\Config\DatabaseStorage
     arguments: ['@database', 'config']
+    public: false
   config.storage.file:
     class: Drupal\Core\Config\FileStorage
     factory_class: Drupal\Core\Config\FileStorageFactory
     factory_method: getActive
+    public: false
   config.storage.staging:
     class: Drupal\Core\Config\FileStorage
     factory_class: Drupal\Core\Config\FileStorageFactory