ONOS-7066 ONOS-7067 PI abstractions refactoring and P4Info model parser

Includes changes previously reviewed in #15607, #15877, and #15955.

Change-Id: Ie2ff62e415f2099832ebfe05961a879b7b188fc3
diff --git a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionGroupMemberId.java b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionGroupMemberId.java
index 98b9d31..3b233a0 100644
--- a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionGroupMemberId.java
+++ b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiActionGroupMemberId.java
@@ -20,7 +20,8 @@
 import org.onlab.util.Identifier;
 
 /**
- * Identifier of a member of an action group in a protocol-independent pipeline.
+ * Identifier of a member of an action group in a protocol-independent pipeline, unique withing the scope on an action
+ * profile.
  */
 @Beta
 public final class PiActionGroupMemberId extends Identifier<Integer> implements PiTableAction {