feat(platform-server): add API to render Module and ModuleFactory to string (#14381)

- PlatformState provides an interface to serialize the current Platform State as a string or Document.

- renderModule and renderModuleFactory are convenience methods to wait for Angular Application to stabilize and then render the state to a string.

- refactor code to remove defaultDoc from DomAdapter and inject DOCUMENT where it's needed.

modules/@angular/platform-server/src/server_renderer.ts

@@ -136,7 +136,7 @@ export class ServerRenderer implements Renderer {
   }
 
   listenGlobal(target: string, name: string, callback: Function): Function {
-    const renderElement = getDOM().getGlobalEventTarget(target);
+    const renderElement = getDOM().getGlobalEventTarget(this._rootRenderer.document, target);
     return this.listen(renderElement, name, callback);
   }