[fenix] Issue https://github.com/mozilla-mobile/fenix/issues/19846: Make sure default browser notification only happens once

app/src/main/java/org/mozilla/fenix/home/intent/DefaultBrowserIntentProcessor.kt

@@ -24,7 +24,6 @@ class DefaultBrowserIntentProcessor(
     override fun process(intent: Intent, navController: NavController, out: Intent): Boolean {
         return if (isDefaultBrowserNotificationIntent(intent)) {
             activity.openSetDefaultBrowserOption()
-            activity.settings().defaultBrowserNotificationDisplayed = true
 
             true
         } else {

app/src/main/java/org/mozilla/fenix/onboarding/DefaultBrowserNotificationWorker.kt

@@ -35,6 +35,10 @@ class DefaultBrowserNotificationWorker(
         ensureChannelExists()
         NotificationManagerCompat.from(applicationContext)
             .notify(NOTIFICATION_TAG, NOTIFICATION_ID, buildNotification())
+
+        // default browser notification should only happen once
+        applicationContext.settings().defaultBrowserNotificationDisplayed = true
+
         return Result.success()
     }