test: closure integration test for change detection (#14691)

integration/hello_world__closure/src/hello-world.component.ts

@@ -1,10 +1,12 @@
-import {Component, Injectable} from '@angular/core';
+import {Component} from '@angular/core';
 
 @Component({
   selector: 'hello-world-app',
-  template: '<div>Hello {{ name }}!</div>',
+  template: `
+    <div>Hello {{ name }}!</div>
+    <input type="text" [value]="name" (input)="name = $event.target.value"/>
+  `,
 })
-@Injectable()
 export class HelloWorldComponent {
   name: string = 'world';
 }