[SDFAB-1177] Separate ingress and egress UpfCounter

Change-Id: I957754bc3f12d2e8f6d9d5748bb0b8c2b01a924c
(cherry picked from commit db0e125ac2515dbb711efdeebc3948b28e9e392b)
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfEntityType.java b/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfEntityType.java
index 07890f7..e13a3c8 100644
--- a/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfEntityType.java
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/upf/UpfEntityType.java
@@ -29,6 +29,8 @@
     SESSION_DOWNLINK("session_downlink"),
     SESSION_UPLINK("session_downlink"),
     TUNNEL_PEER("tunnel_peer"),
+    INGRESS_COUNTER("ingress_counter"),
+    EGRESS_COUNTER("egress_counter"),
     COUNTER("counter"),
     APPLICATION("application"),
     SESSION_METER("session_meter"),