Switched to different Kryonet fork; full Android support

kryonet/src/io/anuke/kryonet/KryoServer.java

@@ -133,6 +133,11 @@ public class KryoServer implements ServerProvider {
         }
     }
 
+    @Override
+    public int getPingFor(int connection) {
+        return getByID(connection).getReturnTripTime();
+    }
+
     @Override
     public void register(Class<?>... types) {
         for(Class<?> c : types){