test store [nfc]: Make changeUserStatuses take a Map instead of a Record

Author: sm-sayedi

test/model/test_store.dart

@@ -275,8 +275,9 @@ extension PerAccountStoreTestExtension on PerAccountStore {
     await handleEvent(UserStatusEvent(id: 1, userId: userId, change: change));
   }
 
-  Future<void> changeUserStatuses(List<(int userId, UserStatusChange change)> changes) async {
-    for (final (userId, change) in changes) {
+  Future<void> changeUserStatuses(Map<int, UserStatusChange> changes) async {
+    for (final MapEntry(key: int userId, value: UserStatusChange change)
+         in changes.entries) {
       await changeUserStatus(userId, change);
     }
   }