Reduce scope of direction mask for access flows

This mask was introduced as part of fixing the punt of DNS packets
for the egress DNS feature. However the mask should be limited to 0x3
to avoid masking droplog metadata.

Signed-off-by: Kiran Shastri <shastrinator@gmail.com>
(cherry picked from commit f6ba62e)

agent-ovs/ovs/include/FlowConstants.h

@@ -182,7 +182,7 @@ extern const uint64_t REMOTE_TUNNEL_BOUNCE_TO_NODE;
 
 namespace access_meta {
 
-const uint64_t MASK =0xff00;
+const uint64_t MASK =0x0300;
 /**
  * Ingress to ep
  */