How to return Http error response from webViewClient.shouldInterceptRequest()?

I've override public WebResourceResponse shouldInterceptRequest(WebView webView, String url) and it should return custom response on request from Ajax function. But looks like WebResourceResponse contains only response body. How can I pass HTTP response like this one :

HTTP/1.1 202
Cache-Control: no-cache
Custom-param: param

to my WebView?