Get the adapter type information from Android OS.

talk/app/webrtc/java/android/org/webrtc/NetworkMonitorAutoDetect.java

Index: talk/app/webrtc/java/android/org/webrtc/NetworkMonitorAutoDetect.java
diff --git a/talk/app/webrtc/java/android/org/webrtc/NetworkMonitorAutoDetect.java b/talk/app/webrtc/java/android/org/webrtc/NetworkMonitorAutoDetect.java
index baadd279a57af8846a0ab15336e125574c60ed97..c77ad73eeae984163f450b1847843c2a4447ec99 100644
--- a/talk/app/webrtc/java/android/org/webrtc/NetworkMonitorAutoDetect.java
+++ b/talk/app/webrtc/java/android/org/webrtc/NetworkMonitorAutoDetect.java
@@ -186,6 +186,19 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver {
       return connectivityManager.getAllNetworks();
     }
 
+    NetworkInformation[] getAllNetworkInfos() {
+      if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP ||
+          connectivityManager == null) {
+        return new NetworkInformation[0];
+      }
+      Network[] networks = getAllNetworks();
+      NetworkInformation[] netInfos = new NetworkInformation[networks.length];
+      for (int i = 0; i < networks.length; ++i) {
+        netInfos[i] = networkToInfo(networks[i]);
+      }
+      return netInfos;
+    }
+
     /**
      * Returns the NetID of the current default network. Returns
      * INVALID_NET_ID if no current default network connected.
@@ -226,6 +239,17 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver {
       return defaultNetId;
     }
 
+    @SuppressLint("NewApi")
+    private NetworkInformation networkToInfo(Network network) {
+      LinkProperties linkProperties = connectivityManager.getLinkProperties(network);
+      NetworkInformation networkInformation = new NetworkInformation(
+          linkProperties.getInterfaceName(),
+          getConnectionType(getNetworkState(network)),
+          networkToNetId(network),
+          getIPAddresses(linkProperties));
+      return networkInformation;
+    }
+
     /**
      * Returns true if {@code network} can provide Internet access. Can be used to
      * ignore specialized networks (e.g. IMS, FOTA).
@@ -250,12 +274,7 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver {
         @Override
         public void onAvailable(Network network) {
           super.onAvailable(network);
-          LinkProperties linkProperties = connectivityManager.getLinkProperties(network);
-          NetworkInformation networkInformation = new NetworkInformation(
-            linkProperties.getInterfaceName(),
-            getConnectionType(getNetworkState(network)),
-            networkToNetId(network),
-            getIPAddresses(linkProperties));
+          NetworkInformation networkInformation = networkToInfo(network);
           Logging.d(TAG, "Network " + networkInformation.name + " is connected ");
           observer.onNetworkConnect(networkInformation);
         }
@@ -428,6 +447,10 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver {
     return connectivityManagerDelegate.getDefaultNetId();
   }
 
+  public NetworkInformation[] getAllNetworkInfos() {
+    return connectivityManagerDelegate.getAllNetworkInfos();
+  }
+
   public static ConnectionType getConnectionType(NetworkState networkState) {
     if (!networkState.isConnected()) {
       return ConnectionType.CONNECTION_NONE;