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

Relates to #9380

modules/@angular/platform-server/test/integration_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 {Component, disposePlatform} from '@angular/core';
 import {afterEach, async, beforeEach, ddescribe, describe, expect, iit, inject, it, xdescribe, xit} from '@angular/core/testing';
 import {BROWSER_APP_PROVIDERS} from '@angular/platform-browser';