xds: Failing to pretty-print XdsClusterResource with WrrLocality

[sergiitk]

What version of gRPC-Java are you using?

master

What did you expect to see?

[xds-client<11>: (trafficdirector.googleapis.com:443)] Received io.grpc.xds.XdsRouteConfigureResource@2853620 response:
{
  "versionInfo": "1740136353437937972",
...
  # regular proto-to-json dump

What did you see instead?

[xds-client<11>: (trafficdirector.googleapis.com:443)] Received io.grpc.xds.XdsClusterResource@3df1ae25 response:
version_info: "1740137068789933426"
resources {
  type_url: "type.googleapis.com/envoy.config.cluster.v3.Cluster"
  value: "\n>cloud-internal-istio:cloud_mp_830293263384_3977456584708448201\020\003\032\n\n\b\032\000\"\002\b\0170\002\"\002\b\036R\"\n \022\006\b\377\377\377\377\a\032\006\b\377\377\377\377\a\"\006\b\377\377\377\377\a*\006\b\377\377\377\377\ar\004\022\002\bd\312\001\231\001\n\226\001\n\032com.google.trafficdirector\022x\n+\n\036backend_service_project_number\022\t\021\000\000\203\270**hB\nI\n\024backend_service_name\0221\032/psm-interop-backend-service-20250221-1118-f2oj1\332\001\r\n\t\t\000\000\000\000\000\000\360?\032\000\342\001]/projects/830293263384/global/backendServices/psm-interop-backend-service-20250221-1118-f2oj1\312\002\223\006\n\220\006\"\215\006\nNBACKEND_SERVICE/830293263384.psm-interop-backend-service-20250221-1118-f2oj1-0\022\272\005\nXtype.googleapis.com/envoy.extensions.load_balancing_policies.wrr_locality.v3.WrrLocality\022\335\004\n\332\004\n\313\001\"\310\001\nNBACKEND_SERVICE/830293263384.psm-interop-backend-service-20250221-1118-f2oj1-1\022v\n+type.googleapis.com/xds.type.v3.TypedStruct\022G\n5type.googleapis.com/test.ThisLoadBalancerDoesNotExist\022\016\n\f\n\003foo\022\005\032\003bar\n\331\001\"\326\001\nNBACKEND_SERVICE/830293263384.psm-interop-backend-service-20250221-1118-f2oj1-2\022\203\001\n+type.googleapis.com/xds.type.v3.TypedStruct\022T\n0type.googleapis.com/test.RpcBehaviorLoadBalancer\022 \n\036\n\vrpcBehavior\022\017\032\rerror-code-15\n\255\001\"\252\001\nNBACKEND_SERVICE/830293263384.psm-interop-backend-service-20250221-1118-f2oj1-3\022X\nVtype.googleapis.com/envoy.extensions.load_balancing_policies.round_robin.v3.RoundRobin\322\002\006*\002\b\0020\002"
}
type_url: "type.googleapis.com/envoy.config.cluster.v3.Cluster"
nonce: "1"
 (failed to pretty-print: com.google.protobuf.InvalidProtocolBufferException: Cannot find type for url: type.googleapis.com/envoy.extensions.load_balancing_policies.wrr_locality.v3.WrrLocality)

Steps to reproduce the bug

Found in this custom_lb test log for the xds client:
https://btx.cloud.google.com/invocations/c0912cc5-ac27-40e6-ae30-f8a91860df80/targets/grpc%2Fjava%2Fmaster%2Fbranch%2Fxds_k8s_lb%2Fcustom_lb_test;config=default/log

I think we just need to add WrrLocality to

grpc-java/xds/src/main/java/io/grpc/xds/MessagePrinter.java

Lines 53 to 56 in 57124d6

	TypeRegistry.Builder registry =
	TypeRegistry.newBuilder()
	.add(Listener.getDescriptor())
	.add(HttpConnectionManager.getDescriptor())

[sergiitk]

cc @temawi

[ejona86]

CC @kannanjgithub