ONOS-7739 Support for P4Runtime multicast programming

Design doc: https://docs.google.com/document/d/13rkQlwr49M-uxQQEuxCMP7BFEPY2gtQ850Hn3gUfesU/edit#heading=h.lzdayib259sq

Change-Id: Ief00bec89fe5a9784b0ee13fdaafa3ae58ab654f
diff --git a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiEntityType.java b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiEntityType.java
index a6c612b..0569f99 100644
--- a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiEntityType.java
+++ b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiEntityType.java
@@ -46,5 +46,15 @@
     /**
      * Register entry.
      */
-    REGISTER_CELL
+    REGISTER_CELL,
+
+    /**
+     * Packet Replication Engine (PRE) multicast group entry.
+     */
+    PRE_MULTICAST_GROUP_ENTRY,
+
+    /**
+     * Packet Replication Engine (PRE) clone session entry.
+     */
+    PRE_CLONE_SESSION_ENTRY
 }