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

packages/flutter_tools/lib/src/commands/create.dart

diff --git a/packages/flutter_tools/lib/src/commands/create.dart b/packages/flutter_tools/lib/src/commands/create.dart
index e20bb5f..ec6f616 100644
--- a/packages/flutter_tools/lib/src/commands/create.dart
+++ b/packages/flutter_tools/lib/src/commands/create.dart
@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:convert';
 
 import 'package:linter/src/rules/pub/package_names.dart' as package_names; // ignore: implementation_imports
 import 'package:linter/src/utils.dart' as linter_utils; // ignore: implementation_imports
@@ -18,6 +17,7 @@
 import '../base/os.dart';
 import '../base/utils.dart';
 import '../cache.dart';
+import '../convert.dart';
 import '../dart/pub.dart';
 import '../doctor.dart';
 import '../globals.dart';