Revert "refactor(core): tree-shake application_module providers (#23477)"

This reverts commit eb031c6ff1.

The change is breaking targets in g3 see cl/194336387.

packages/core/src/application_module.ts

@@ -6,11 +6,13 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
+import {ApplicationInitStatus} from './application_init';
+import {ApplicationRef} from './application_ref';
 import {APP_ID_RANDOM_PROVIDER} from './application_tokens';
 import {IterableDiffers, KeyValueDiffers, defaultIterableDiffers, defaultKeyValueDiffers} from './change_detection/change_detection';
 import {Inject, Optional, SkipSelf} from './di/metadata';
-import {APP_ROOT} from './di/scope';
 import {LOCALE_ID} from './i18n/tokens';
+import {Compiler} from './linker/compiler';
 import {NgModule} from './metadata';
 
 export function _iterableDiffersFactory() {
@@ -26,14 +28,17 @@ export function _localeFactory(locale?: string): string {
 }
 
 /**
+ * This module includes the providers of @angular/core that are needed
+ * to bootstrap components via `ApplicationRef`.
+ *
  * @experimental
  */
 @NgModule({
   providers: [
+    ApplicationRef,
+    ApplicationInitStatus,
+    Compiler,
     APP_ID_RANDOM_PROVIDER,
-    // wen-workers need this value to be here since WorkerApp is defined
-    // ontop of this application
-    {provide: APP_ROOT, useValue: true},
     {provide: IterableDiffers, useFactory: _iterableDiffersFactory},
     {provide: KeyValueDiffers, useFactory: _keyValueDiffersFactory},
     {
@@ -44,4 +49,6 @@ export function _localeFactory(locale?: string): string {
   ]
 })
 export class ApplicationModule {
+  // Inject ApplicationRef to make it eager...
+  constructor(appRef: ApplicationRef) {}
 }