build: set up universal checks for drag&drop (#14132)

Adds `drag-drop` to the Angular Universal CI checks.

Author: crisbeto

src/universal-app/kitchen-sink/kitchen-sink.html

@@ -364,3 +364,11 @@ <h2>Badge</h2>
 <button mat-raised-button matBadge="99">
   Clicky thing
 </button>
+
+<h2>Drag and Drop</h2>
+<button cdkDrag>Drag me around</button>
+
+<ul cdkDropList>
+  <li cdkDrag>One</li>
+  <li cdkDrag>Two</li>
+</ul>

src/universal-app/kitchen-sink/kitchen-sink.ts

@@ -47,6 +47,7 @@ import {
 import {BrowserModule} from '@angular/platform-browser';
 import {ServerModule} from '@angular/platform-server';
 import {FocusMonitor} from '@angular/cdk/a11y';
+import {DragDropModule} from '@angular/cdk/drag-drop';
 import {Observable, of as observableOf} from 'rxjs';
 
 export class TableDataSource extends DataSource<any> {
@@ -136,7 +137,8 @@ export class KitchenSink {
     MatStepperModule,
 
     // CDK Modules
-    CdkTableModule
+    CdkTableModule,
+    DragDropModule,
   ],
   bootstrap: [KitchenSink],
   declarations: [KitchenSink, TestEntryComponent],