[rialto] Log request and response type for debugging

Test: atest rialto_test
Change-Id: Ic5aa196b8d2ce57018c2ce9eb25667bb6d68400c
diff --git a/rialto/src/main.rs b/rialto/src/main.rs
index ad9b776..48b69b3 100644
--- a/rialto/src/main.rs
+++ b/rialto/src/main.rs
@@ -177,7 +177,9 @@
 
     let mut vsock_stream = VsockStream::new(socket_device, host_addr())?;
     while let ServiceVmRequest::Process(req) = vsock_stream.read_request()? {
+        info!("Received request: {}", req.name());
         let response = process_request(req, bcc_handover.as_ref());
+        info!("Sending response: {}", response.name());
         vsock_stream.write_response(&response)?;
         vsock_stream.flush()?;
     }