Prepare devtools_shared for publish (#9183)

Author: kenzieschmoll

packages/devtools_shared/CHANGELOG.md

@@ -3,6 +3,11 @@ Copyright 2025 The Flutter Authors
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 -->
+# 11.2.1
+* Rename `Handler` extension methods to `VmServiceHandler`. This member was
+marked `@visibleForTesting` and should not be used outside of this package, so
+we consider this change non-breaking.
+
 # 11.2.0
 * Bump `vm_service` dependency upper bound to `<16.0.0`.
 

packages/devtools_shared/pubspec.yaml

@@ -4,7 +4,7 @@
 name: devtools_shared
 description: Package of shared Dart structures between devtools_app, dds, and other tools.
 
-version: 11.2.0
+version: 11.2.1
 
 repository: https://github.com/flutter/devtools/tree/master/packages/devtools_shared