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

Relates to #9380

modules/playground/e2e_test/web_workers/input/input_spec.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 {verifyNoBrowserErrors} from '@angular/platform-browser/testing_e2e';
 
 describe('WebWorkers Input', function() {

modules/playground/e2e_test/web_workers/kitchen_sink/kitchen_sink_spec.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 {verifyNoBrowserErrors} from '@angular/platform-browser/testing_e2e';
 
 describe('WebWorkers Kitchen Sink', function() {

modules/playground/e2e_test/web_workers/message_broker/message_broker_spec.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 {verifyNoBrowserErrors} from '@angular/platform-browser/testing_e2e';
 
 var URL = 'all/playground/src/web_workers/message_broker/index.html';

modules/playground/e2e_test/web_workers/router/router_spec.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 {verifyNoBrowserErrors} from '@angular/platform-browser/testing_e2e';
 
 describe("WebWorker Router", () => {

modules/playground/e2e_test/web_workers/todo/todo_spec.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 {verifyNoBrowserErrors} from '@angular/platform-browser/testing_e2e';
 
 describe('WebWorkers Todo', function() {