fix(animations): properly cache renderer and namespace triggers (#14703)

- Don’t use the animation renderer if a component
  used style encapsulation but no animations.
- The `AnimationRenderer` should be cached in the same
  lifecycle as its delegate.
- Trigger names need to be namespaced per component type.

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

@@ -306,6 +306,8 @@ export class ServerRendererFactoryV2 implements RendererFactoryV2 {
 }
 
 class DefaultServerRendererV2 implements RendererV2 {
+  data: {[key: string]: any} = Object.create(null);
+
   constructor(
       private document: any, private ngZone: NgZone, private schema: DomElementSchemaRegistry) {}