Update mojo shell so that --args-for can be used on android

shell/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 import("//mojo/public/mojo.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 # We don't support building in the component build since mojo apps are
 # inherently components.
@@ skipping 119 matching lines @@
 source_set("lib") {
   sources = [
     "app_child_process.cc",
     "app_child_process.h",
     "app_child_process_host.cc",
     "app_child_process_host.h",
     "child_process.cc",
     "child_process.h",
     "child_process_host.cc",
     "child_process_host.h",
+    "command_line_util.cc",
+    "command_line_util.h",
     "context.cc",
     "context.h",
     "data_pipe_peek.cc",
     "data_pipe_peek.h",
     "dynamic_application_loader.cc",
     "dynamic_application_loader.h",
     "external_application_listener.h",
     "external_application_listener_posix.cc",
     "external_application_listener_win.cc",
     "filename_util.cc",
@@ skipping 295 matching lines @@
 
     deps -= [
       ":lib",
       ":external_application_registrar_connection",
       ":external_application_registrar_bindings",
       "//shell/domain_socket",
       "//shell/domain_socket:tests",
     ]
   }
 }