Issue #2184231 by jibran, dawehner, Xano: Use ConfigFactoryInterface to type hint ConfigFactory.

core/lib/Drupal.php

core/lib/Drupal/Core/Config/ConfigFactoryInterface.php

core/lib/Drupal/Core/Config/ConfigInstaller.php

...lib/Drupal/Core/Config/Entity/ConfigStorageController.php

core/lib/Drupal/Core/Config/Entity/Query/Query.php

core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php

core/lib/Drupal/Core/Datetime/Date.php

core/lib/Drupal/Core/Extension/ThemeHandler.php

core/lib/Drupal/Core/Form/ConfigFormBase.php

core/lib/Drupal/Core/Form/FormBase.php

core/lib/Drupal/Core/ImageToolkit/ImageToolkitManager.php

core/lib/Drupal/Core/Mail/MailFactory.php

core/lib/Drupal/Core/PathProcessor/PathProcessorDecode.php

core/lib/Drupal/Core/PathProcessor/PathProcessorFront.php

core/lib/Drupal/Core/Routing/UrlGenerator.php

core/lib/Drupal/Core/Theme/AjaxBasePageNegotiator.php

core/lib/Drupal/Core/Theme/DefaultNegotiator.php

...es/aggregator/lib/Drupal/aggregator/Form/SettingsForm.php

...gregator/Plugin/aggregator/processor/DefaultProcessor.php

...egator_test/Plugin/aggregator/processor/TestProcessor.php