TF-297 Store language selected when user changed

lib/features/manage_account/data/repository/manage_account_repository_impl.dart

@@ -1,3 +1,5 @@
+import 'dart:ui';
+
 import 'package:jmap_dart_client/jmap/account_id.dart';
 import 'package:jmap_dart_client/jmap/core/properties/properties.dart';
 import 'package:jmap_dart_client/jmap/identities/identity.dart';
@@ -32,4 +34,9 @@ class ManageAccountRepositoryImpl extends ManageAccountRepository {
   Future<bool> editIdentity(AccountId accountId, EditIdentityRequest editIdentityRequest) {
     return dataSource.editIdentity(accountId, editIdentityRequest);
   }
+
+  @override
+  Future<void> persistLanguage(Locale localeCurrent) {
+    return dataSource.persistLanguage(localeCurrent);
+  }
 }