libnetdevice: define default request flags

Bug: 372814636
Test: verified with b/372814636 test service
Change-Id: I81e8ac625e6d075d9780b6e2e0a172aec0a04468
diff --git a/automotive/can/1.0/default/libnetdevice/can.cpp b/automotive/can/1.0/default/libnetdevice/can.cpp
index 8d82c36..9cf0253 100644
--- a/automotive/can/1.0/default/libnetdevice/can.cpp
+++ b/automotive/can/1.0/default/libnetdevice/can.cpp
@@ -70,7 +70,7 @@
     can_bittiming bt = {};
     bt.bitrate = bitrate;
 
-    nl::MessageFactory<ifinfomsg> req(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_ACK);
+    nl::MessageFactory<ifinfomsg> req(RTM_NEWLINK);
 
     req->ifi_index = nametoindex(ifname);
     if (req->ifi_index == 0) {