2 string references to router.builder

ContentTranslationPendingRevisionTestBase::enableContentModeration in core/modules/content_translation/tests/src/Functional/ContentTranslationPendingRevisionTestBase.php: Enables content moderation for the test entity type and bundle.
InstallerServiceProvider::register in core/lib/Drupal/Core/Installer/InstallerServiceProvider.php: Registers services to the container.

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