[java] fix null request in case of chunked request (#13113)

* [java] fix null request in case of chunked request

* set the request in case of a protocol upgrade

* fix linting issues

---------

Co-authored-by: Diego Molina <[email protected]>

Author: nikhlagrwl

java/src/org/openqa/selenium/netty/server/RequestConverter.java

@@ -67,11 +67,6 @@ protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Ex
       io.netty.handler.codec.http.HttpRequest nettyRequest =
           (io.netty.handler.codec.http.HttpRequest) msg;
 
-      if (HttpUtil.is100ContinueExpected(nettyRequest)) {
-        ctx.write(new HttpResponse().setStatus(100));
-        return;
-      }
-
       if (nettyRequest.headers().contains("Sec-WebSocket-Version")
           && "upgrade".equalsIgnoreCase(nettyRequest.headers().get("Connection"))) {
         // Pass this on to later in the pipeline.
@@ -85,6 +80,11 @@ protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Ex
         return;
       }
 
+      if (HttpUtil.is100ContinueExpected(nettyRequest)) {
+        ctx.write(new HttpResponse().setStatus(100));
+        return;
+      }
+
       request.setAttribute(
           AttributeKey.HTTP_SCHEME.getKey(), nettyRequest.protocolVersion().protocolName());
       request.setAttribute(