chore(lint): Added license headers to most TypeScript files

Relates to #9380

modules/playground/src/routing/app/data.ts

@@ -1,3 +1,11 @@
+/**
+ * @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
+ */
+
 export var data = [
   {
     "id": "1",

modules/playground/src/routing/app/inbox-app.ts

@@ -1,3 +1,11 @@
+/**
+ * @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 {Component, Injectable} from '@angular/core';
 import {ROUTER_DIRECTIVES, ActivatedRoute, Router} from '@angular/router';
 import * as db from './data';

modules/playground/src/routing/index.ts

@@ -1,3 +1,11 @@
+/**
+ * @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 {InboxApp, ROUTER_CONFIG} from './app/inbox-app';
 import {bootstrap} from '@angular/platform-browser-dynamic';
 import {HashLocationStrategy, LocationStrategy} from '@angular/common';