[ONOS-7051] Support for P4Runtime meters

Change-Id: Id71374af65aeb84b71636b4ec230dc6001a77a8b
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 21c09de..5ef452b 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
@@ -36,5 +36,10 @@
     /**
      * Action profile group member.
      */
-    GROUP_MEMBER
+    GROUP_MEMBER,
+
+    /**
+     * Meter config.
+     */
+    METER_CELL_CONFIG
 }