Extract and publish p4runtime protocol utils in separate artifact

For consumption by third-party apps built via mvn

Change-Id: Ic9c1eccb2519b2952cdb632e1f07ccefbba00396
diff --git a/protocols/p4runtime/ctl/BUILD b/protocols/p4runtime/ctl/BUILD
index 5fbbd68..dca5f38 100644
--- a/protocols/p4runtime/ctl/BUILD
+++ b/protocols/p4runtime/ctl/BUILD
@@ -4,6 +4,7 @@
     "//protocols/grpc/ctl:onos-protocols-grpc-ctl",
     "//protocols/p4runtime/api:onos-protocols-p4runtime-api",
     "//protocols/p4runtime/proto:onos-protocols-p4runtime-proto",
+    "//protocols/p4runtime/utils:onos-protocols-p4runtime-utils",
     "//deps:com_google_protobuf_protobuf_java",
     "//deps:io_grpc_grpc_api_context",
     "//deps:io_grpc_grpc_netty",