chore: update copyright and license information in mock files

Author: SelaseKay

packages/firebase_app_check/firebase_app_check_web/test/firebase_app_check_web_test.mocks.dart

@@ -1,3 +1,10 @@
+// Copyright 2021 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// Mocks generated by Mockito 5.4.0 from annotations
+// in firebase_app_check_web/test/firebase_app_check_web_test.dart.
+// Do not manually edit this file.
+
 // Mocks generated by Mockito 5.4.6 from annotations
 // in firebase_app_check_web/test/firebase_app_check_web_test.dart.
 // Do not manually edit this file.

packages/firebase_data_connect/firebase_data_connect/test/src/network/rest_transport_test.mocks.dart

@@ -1,3 +1,17 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Mocks generated by Mockito 5.4.6 from annotations
 // in firebase_data_connect/test/src/network/rest_transport_test.dart.
 // Do not manually edit this file.