add support build number for android

lib/pages/main/model/main_model.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:io';
 
 import 'package:fcs/data/services/services.dart';
 import 'package:fcs/domain/entities/auth_result.dart';
@@ -150,7 +151,11 @@ class MainModel extends ChangeNotifier {
 
   bool isSupport() {
     if (packageInfo == null || setting == null) return false;
-    return int.parse(packageInfo!.buildNumber) >= setting!.supportBuildNum;
+
+    int buildNumber = Platform.isAndroid
+        ? setting!.androidSupportBuildNum
+        : setting!.supportBuildNum;
+    return int.parse(packageInfo!.buildNumber) >= buildNumber;
   }
 
   Future<AuthResult> sendSms(String phoneNumber,