[messaging] Change import in service worker (#224)

Author: jhuleatt

messaging-next/service-worker.js

@@ -16,7 +16,7 @@ let self;
 function initInSw() {
   // [START messaging_init_in_sw]
   const { initializeApp } = require("firebase/app");
-  const { getMessaging } = require("firebase/messaging");
+  const { getMessaging } = require("firebase/messaging/sw");
 
   // Initialize the Firebase app in the service worker by passing in
   // your app's Firebase config object.

snippets/messaging-next/service-worker/messaging_init_in_sw.js

@@ -6,7 +6,7 @@
 
 // [START messaging_init_in_sw_modular]
 import { initializeApp } from "firebase/app";
-import { getMessaging } from "firebase/messaging";
+import { getMessaging } from "firebase/messaging/sw";
 
 // Initialize the Firebase app in the service worker by passing in
 // your app's Firebase config object.