如何在KitKat上以编程方式配置的代理上设置排除列表？

I am using this code to setup a proxy for my WebView on Android and it is working well. I have modified the code to use an exclusion list. On devices using the android.net.ProxyProperties I am passing an exclusion list like ".google.com,.bing.com" and on devices using the System properties I am passing " to setup a proxy for my We