Get the adapter type information from Android OS.

talk/app/webrtc/androidtests/src/org/webrtc/NetworkMonitorTest.java

Index: talk/app/webrtc/androidtests/src/org/webrtc/NetworkMonitorTest.java
diff --git a/talk/app/webrtc/androidtests/src/org/webrtc/NetworkMonitorTest.java b/talk/app/webrtc/androidtests/src/org/webrtc/NetworkMonitorTest.java
index 8c0a794ea00f57d5f659f664c459e2d452239311..3bdbbddb789431ba15d72276461dd975e94e8015 100644
--- a/talk/app/webrtc/androidtests/src/org/webrtc/NetworkMonitorTest.java
+++ b/talk/app/webrtc/androidtests/src/org/webrtc/NetworkMonitorTest.java
@@ -142,6 +142,9 @@ public class NetworkMonitorTest extends ActivityTestCase {
 
     @Override
     public void onNetworkConnect(NetworkInformation networkInfo) {}
+
+    @Override
+    public void onNetworkDisconnect(int networkHandle) {}
   }
 
   private static final Object lock = new Object();