fix(packages): use ES modules for primary build (#11120)

modules/@angular/platform-browser-dynamic/testing/index.ts

@@ -0,0 +1,38 @@
+/**
+ * @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 {platformCoreDynamicTesting} from '@angular/compiler/testing';
+import {ClassProvider, ExistingProvider, FactoryProvider, NgModule, PlatformRef, Provider, TypeProvider, ValueProvider, createPlatformFactory} from '@angular/core';
+import {TestComponentRenderer} from '@angular/core/testing';
+import {BrowserTestingModule} from '@angular/platform-browser/testing';
+
+import {DOMTestComponentRenderer} from './dom_test_component_renderer';
+import {INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS} from './private_import_platform-browser-dynamic';
+
+export * from './private_export_testing'
+
+/**
+ * @stable
+ */
+export const platformBrowserDynamicTesting = createPlatformFactory(
+    platformCoreDynamicTesting, 'browserDynamicTesting',
+    INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS);
+
+/**
+ * NgModule for testing.
+ *
+ * @stable
+ */
+@NgModule({
+  exports: [BrowserTestingModule],
+  providers: [
+    {provide: TestComponentRenderer, useClass: DOMTestComponentRenderer},
+  ]
+})
+export class BrowserDynamicTestingModule {
+}