build: Update flutter

.tool_versions.yaml

@@ -1,2 +1,2 @@
 environment:
-  flutter: 3.41.4
+  flutter: 3.41.5 # Keep in sync with snap/snapcraft.yaml

lib/utils/background_push.dart

@@ -23,6 +23,7 @@ import 'dart:io';
 import 'dart:isolate';
 import 'dart:ui';
 
+//<GOOGLE_SERVICES>import 'package:fcm_shared_isolate/fcm_shared_isolate.dart';
 import 'package:fluffychat/l10n/l10n.dart';
 import 'package:fluffychat/main.dart';
 import 'package:fluffychat/utils/notification_background_handler.dart';
@@ -42,8 +43,6 @@ import '../config/setting_keys.dart';
 import '../widgets/matrix.dart';
 import 'platform_infos.dart';
 
-//<GOOGLE_SERVICES>import 'package:fcm_shared_isolate/fcm_shared_isolate.dart';
-
 class BackgroundPush {
   static BackgroundPush? _instance;
   final FlutterLocalNotificationsPlugin _flutterLocalNotificationsPlugin =

snap/snapcraft.yaml

@@ -53,7 +53,7 @@ platforms:
 parts:
   flutter-git:
     source: https://github.com/flutter/flutter.git
-    source-tag: 3.41.2
+    source-tag: 3.41.5
     source-depth: 1
     plugin: nil
     override-build: |