Wrap dart:convert to track utf8 decode failures (#26650)

diff --git a/packages/flutter_tools/lib/src/android/android_sdk.dart b/packages/flutter_tools/lib/src/android/android_sdk.dart
index 39f90f5..f97cc5b 100644
--- a/packages/flutter_tools/lib/src/android/android_sdk.dart
+++ b/packages/flutter_tools/lib/src/android/android_sdk.dart
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:convert';
-
 import 'package:meta/meta.dart';
 
 import '../base/common.dart';
@@ -15,6 +13,7 @@
 import '../base/process.dart';
 import '../base/process_manager.dart';
 import '../base/version.dart';
+import '../convert.dart';
 import '../globals.dart';
 import 'android_studio.dart' as android_studio;