fix(aio): add service worker entrypoint to aio build (#19875)

Fixes #19838

PR Close #19875

aio/tools/transforms/angular-api-package/index.js

@@ -63,6 +63,7 @@ module.exports = new Package('angular-api', [basePackage, typeScriptPackage])
       'router/index.ts',
       'router/testing/index.ts',
       'router/upgrade/index.ts',
+      'service-worker/index.ts',
       'upgrade/index.ts',
       'upgrade/static/index.ts',
     ];

aio/tools/transforms/authors-package/api-package.js

@@ -21,6 +21,7 @@ const packageMap = {
   'platform-webworker': ['platform-webworker/index.ts'],
   'platform-webworker-dynamic': 'platform-webworker-dynamic/index.ts',
   router: ['router/index.ts', 'router/testing/index.ts', 'router/upgrade/index.ts'],
+  'service-worker': ['service-worker/index.ts'],
   upgrade: ['upgrade/index.ts', 'upgrade/static/index.ts']
 };
 

packages/service-worker/index.ts

@@ -0,0 +1,14 @@
+/**
+ * @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
+ */
+
+// This file is not used to build this module. It is only used during editing
+// by the TypeScript language service and during build for verification. `ngc`
+// replaces this file with production index.ts when it rewrites private symbol
+// names.
+
+export * from './public_api';