Change the NetworkInfo for disconnected types.

Don't send out NetworkInfos with UNKNOWN state for disconnected
networks - use DISCONNECTED.

bug:17095670
Change-Id: I863bebadc1f9a666572958b49d5e62809f485e5d

services/core/java/com/android/server/ConnectivityService.java

@@ -4759,7 +4759,9 @@ public class ConnectivityService extends IConnectivityManager.Stub {
             result.setType(networkType);
             return result;
         } else {
-           return new NetworkInfo(networkType, 0, "Unknown", "");
+            NetworkInfo result = new NetworkInfo(networkType);
+            result.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null);
+            return result;
         }
     }