perf(core): use ngDevMode to tree-shake checkNoChanges (#39964)

This commit adds `ngDevMode` guard to run `checkNoChanges` only
in dev mode (similar to how things work in other parts of Ivy runtime code).
The `ngDevMode` flag helps to tree-shake this code from production builds
(in dev mode everything will work as it works right now) to decrease production bundle size.

PR Close #39964

goldens/size-tracking/aio-payloads.json

@@ -12,7 +12,7 @@
  "master": {
  "uncompressed": {
  "runtime-es2015": 3033,
- "main-es2015": 447343,
+ "main-es2015": 446749,
  "polyfills-es2015": 52493
  }
  }

goldens/size-tracking/integration-payloads.json

@@ -3,7 +3,7 @@
  "master": {
  "uncompressed": {
  "runtime-es2015": 1485,
- "main-es2015": 140899,
+ "main-es2015": 134899,
  "polyfills-es2015": 36571
  }
  }

packages/core/src/application_ref.ts

@@ -573,7 +573,6 @@ export class ApplicationRef {
  private _bootstrapListeners: ((compRef: ComponentRef<any>) => void)[] = [];
  private _views: InternalViewRef[] = [];
  private _runningTick: boolean = false;
- private _enforceNoNewChanges: boolean = false;
  private _stable = true;
  private _onMicrotaskEmptySubscription: Subscription;
 
@@ -602,8 +601,6 @@ export class ApplicationRef {
  private _exceptionHandler: ErrorHandler,
  private _componentFactoryResolver: ComponentFactoryResolver,
  private _initStatus: ApplicationInitStatus) {
- this._enforceNoNewChanges = isDevMode();
-
  this._onMicrotaskEmptySubscription = this._zone.onMicrotaskEmpty.subscribe({
  next: () => {
  this._zone.run(() => {
@@ -740,7 +737,9 @@ export class ApplicationRef {
  for (let view of this._views) {
  view.detectChanges();
  }
- if (this._enforceNoNewChanges) {
+ // Note that we have still left the `isDevMode()` condition in order to avoid
+ // creating a breaking change for projects that still use the View Engine.
+ if ((typeof ngDevMode === 'undefined' || ngDevMode) && isDevMode()) {
  for (let view of this._views) {
  view.checkNoChanges();
  }