Use a newer method to bind socket to network in Android M and later.

webrtc/api/androidtests/src/org/webrtc/NetworkMonitorTest.java

Index: webrtc/api/androidtests/src/org/webrtc/NetworkMonitorTest.java
diff --git a/webrtc/api/androidtests/src/org/webrtc/NetworkMonitorTest.java b/webrtc/api/androidtests/src/org/webrtc/NetworkMonitorTest.java
index cee3bd1d91b04b4ebbc5d062ba4d8b55706f171e..785f37fe17dbda821ef3510b7d967dae6f9ccca9 100644
--- a/webrtc/api/androidtests/src/org/webrtc/NetworkMonitorTest.java
+++ b/webrtc/api/androidtests/src/org/webrtc/NetworkMonitorTest.java
@@ -72,7 +72,7 @@ public class NetworkMonitorTest extends ActivityTestCase {
     // Dummy implementations to avoid NullPointerExceptions in default implementations:
 
     @Override
-    public int getDefaultNetId() {
+    public long getDefaultNetId() {
       return INVALID_NET_ID;
     }
 
@@ -127,7 +127,7 @@ public class NetworkMonitorTest extends ActivityTestCase {
     public void onNetworkConnect(NetworkInformation networkInfo) {}
 
     @Override
-    public void onNetworkDisconnect(int networkHandle) {}
+    public void onNetworkDisconnect(long networkHandle) {}
   }
 
   private static final Object lock = new Object();