Move mojo\shell to services\shell

mojo/shell/tests/lifecycle/app.cc

-// Copyright 2016 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.
-
-#include "mojo/public/c/system/main.h"
-#include "mojo/shell/public/cpp/application_runner.h"
-#include "mojo/shell/tests/lifecycle/app_client.h"
-
-MojoResult MojoMain(MojoHandle shell_handle) {
-  mojo::shell::test::AppClient* app = new mojo::shell::test::AppClient;
-  mojo::ApplicationRunner runner(app);
-  app->set_runner(&runner);
-  return runner.Run(shell_handle);
-}