Add UNKNOWN_CELLULAR network type and allow unknown network type in NetworkMonitor

webrtc/api/java/jni/androidnetworkmonitor_jni.h

 /*
  *  Copyright 2015 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.
  */
 
@@ skipping 13 matching lines @@
 typedef uint32_t NetworkHandle;
 
 // c++ equivalent of java NetworkMonitorAutoDetect.ConnectionType.
 enum NetworkType {
   NETWORK_UNKNOWN,
   NETWORK_ETHERNET,
   NETWORK_WIFI,
   NETWORK_4G,
   NETWORK_3G,
   NETWORK_2G,
+  NETWORK_UNKNOWN_CELLULAR,
   NETWORK_BLUETOOTH,
   NETWORK_NONE
 };
 
 // The information is collected from Android OS so that the native code can get
 // the network type and handle (Android network ID) for each interface.
 struct NetworkInformation {
   std::string interface_name;
   NetworkHandle handle;
   NetworkType type;
@@ skipping 38 matching lines @@
 class AndroidNetworkMonitorFactory : public rtc::NetworkMonitorFactory {
  public:
   AndroidNetworkMonitorFactory() {}
 
   rtc::NetworkMonitorInterface* CreateNetworkMonitor() override;
 };
 
 }  // namespace webrtc_jni
 
 #endif  // WEBRTC_API_JAVA_JNI_ANDROIDNETWORKMONITOR_JNI_H_