[remoting android] Add and build host code.

remoting/host/android/remoting_host_jni_onload.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 "base/android/base_jni_onload.h"
 #include "base/android/base_jni_registrar.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/bind.h"
 #include "base/macros.h"
+#include "net/android/net_jni_registrar.h"
 #include "remoting/host/android/remoting_host_jni_registrar.h"
 
 namespace {
 
 base::android::RegistrationMethod kRemotingRegisteredMethods[] = {
     {"base", base::android::RegisterJni},
+    {"net", net::android::RegisterJni},
     {"remoting_host", remoting::RegisterJni},
 };
 
 bool RegisterJNI(JNIEnv* env) {
   return base::android::RegisterNativeMethods(
       env, kRemotingRegisteredMethods, arraysize(kRemotingRegisteredMethods));
 }
 
 }  // namespace
 
 JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
   std::vector<base::android::RegisterCallback> register_callbacks;
   register_callbacks.push_back(base::Bind(&RegisterJNI));
   std::vector<base::android::InitCallback> init_callbacks;
   if (!base::android::OnJNIOnLoadRegisterJNI(vm, register_callbacks) ||
       !base::android::OnJNIOnLoadInit(init_callbacks)) {
     return -1;
   }
   return JNI_VERSION_1_4;
 }