android: Introduce a ui::PlatformWindow implementation for android.

mandoline/app/android/BUILD.gn

 # Copyright 2015 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.
 
 assert(is_android)
 
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//mojo/generate_mojo_shell_assets_list.gni")
 
@@ skipping 113 matching lines @@
   asset_location = mandoline_assets_dir
 
   deps = [
     ":build_mandoline_assets",
     ":copy_mandoline_runner",
     ":java",
     ":mandoline_apk_resources",
     "//mojo/runner:java",
     "//mojo/runner:resources",
     "//base:base_java",
-    "//components/view_manager:view_manager_java",
     "//third_party/android_tools:google_play_services_default_resources",
+    "//ui/platform_window/android:platform_window_java",
   ]
 }