feat(i18n): pass translation config directly into ngc (#10622)

modules/@angular/core/src/i18n/tokens.ts

@@ -0,0 +1,24 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {OpaqueToken} from '../di/opaque_token';
+
+/**
+ * @experimental i18n support is experimental.
+ */
+export const LOCALE_ID = new OpaqueToken('LocaleId');
+
+/**
+ * @experimental i18n support is experimental.
+ */
+export const TRANSLATIONS = new OpaqueToken('Translations');
+
+/**
+ * @experimental i18n support is experimental.
+ */
+export const TRANSLATIONS_FORMAT = new OpaqueToken('TranslationsFormat');