[remoting android] Add and build host code.

remoting/host/it2me/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/features.gni")
 import("//remoting/remoting_enable.gni")
 import("//remoting/remoting_srcs.gni")
 
 source_set("common") {
   sources = rebase_path(
           remoting_host_srcs_gypi_values.remoting_it2me_host_static_sources,
           ".",
           "//remoting")
 
   configs += [
     "//build/config/compiler:wexit_time_destructors",
     "//remoting:version",
   ]
 
   deps = [
     "//base:i18n",
     "//net:net",
     "//remoting/base",
     "//remoting/host",
     "//remoting/protocol",
     "//remoting/resources",
   ]
 }
 
-if (!is_chromeos && enable_remoting_host) {
+if (!is_chromeos && !is_android && enable_remoting_host) {
   if (is_win) {
     # GYP version:
     # //remoting/remoting_host_win.gypi:remoting_it2me_native_messaging_host
     executable("remote_assistance_host") {
       configs += [ "//build/config/compiler:wexit_time_destructors" ]
 
       deps = [
         "//base/allocator",
         "//remoting/host:remoting_core",
         "//remoting/host:remoting_windows_resources",
@@ skipping 43 matching lines @@
       if (enable_webrtc) {
         deps += [ "//third_party/libjingle:libjingle_webrtc" ]
       }
 
       if (is_desktop_linux) {
         deps += [ "//build/config/linux/gtk2" ]
       }
     }
   }
 }