Update Cython gRPC code
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd b/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd
index 9ee4878..4c844e4 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pxd
@@ -66,6 +66,7 @@
   cdef readonly call.Call operation_call
 
   # For Server.request_call
+  cdef readonly bint is_new_request
   cdef readonly CallDetails request_call_details
   cdef readonly Metadata request_metadata