Move Android network monitor to separate target/directory.

Not sure why it was lumped in with base in the first place.
But now that it's not set via a static method, it makes less sense.

Bug: webrtc:9883
Change-Id: Ia46834865fa485c9949a01fec10cecba465246ba
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/180741
Commit-Queue: Taylor <deadbeef@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31852}

sdk/android/native_api/network_monitor/network_monitor.cc

@@ -0,0 +1,31 @@
+/*
+ *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "sdk/android/native_api/network_monitor/network_monitor.h"
+
+#include <memory>
+
+#include "sdk/android/src/jni/android_network_monitor.h"
+
+namespace webrtc {
+
+std::unique_ptr<rtc::NetworkMonitorFactory> CreateAndroidNetworkMonitorFactory(
+    JNIEnv* env,
+    jobject application_context) {
+  return std::make_unique<jni::AndroidNetworkMonitorFactory>(
+      env, JavaParamRef<jobject>(application_context));
+}
+
+std::unique_ptr<rtc::NetworkMonitorFactory>
+CreateAndroidNetworkMonitorFactory() {
+  return std::make_unique<jni::AndroidNetworkMonitorFactory>();
+}
+
+}  // namespace webrtc

sdk/android/native_api/network_monitor/network_monitor.h

@@ -0,0 +1,36 @@
+/*
+ *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef SDK_ANDROID_NATIVE_API_NETWORK_MONITOR_NETWORK_MONITOR_H_
+#define SDK_ANDROID_NATIVE_API_NETWORK_MONITOR_NETWORK_MONITOR_H_
+
+#include <jni.h>
+
+#include <memory>
+
+#include "rtc_base/network_monitor_factory.h"
+
+namespace webrtc {
+
+// Creates an Android-specific network monitor, which is capable of detecting
+// network changes as soon as they occur, requesting a cellular interface
+// (dependent on permissions), and binding sockets to network interfaces (more
+// reliable than binding to IP addresses on Android).
+std::unique_ptr<rtc::NetworkMonitorFactory> CreateAndroidNetworkMonitorFactory(
+    JNIEnv* env,
+    jobject application_context);
+
+// Deprecated. Pass in application context instead.
+std::unique_ptr<rtc::NetworkMonitorFactory>
+CreateAndroidNetworkMonitorFactory();
+
+}  // namespace webrtc
+
+#endif  // SDK_ANDROID_NATIVE_API_NETWORK_MONITOR_NETWORK_MONITOR_H_