Use the new notification sound. (#4572)

* Use the new notification sound.

* Add a banner informing the user of the new notification sound.

ElementX/Sources/Application/AppCoordinator.swift

@@ -437,6 +437,11 @@ class AppCoordinator: AppCoordinatorProtocol, AuthenticationFlowCoordinatorDeleg
             await userSession.clientProxy.expireSyncSessions()
         }
         
+        if oldVersion < Version(25, 10, 0) {
+            MXLog.info("Migrating to version 25.10.0, showing new sound banner to existing user.")
+            appSettings.hasSeenNewSoundBanner = false
+        }
+        
         userSessionMigrationsOldVersion = nil
     }