Update code generation with PickFirst message

Author: murgatroid99

packages/grpc-js-xds/package.json

@@ -12,7 +12,7 @@
     "prepare": "npm run compile",
     "pretest": "npm run compile",
     "posttest": "npm run check",
-    "generate-types": "proto-loader-gen-types --keepCase --longs String --enums String --defaults --oneofs --includeComments --includeDirs deps/envoy-api/ deps/xds/ deps/googleapis/ deps/protoc-gen-validate/ -O src/generated/ --grpcLib @grpc/grpc-js envoy/service/discovery/v3/ads.proto envoy/service/load_stats/v3/lrs.proto envoy/config/listener/v3/listener.proto envoy/config/route/v3/route.proto envoy/config/cluster/v3/cluster.proto envoy/config/endpoint/v3/endpoint.proto envoy/extensions/filters/network/http_connection_manager/v3/http_connection_manager.proto udpa/type/v1/typed_struct.proto xds/type/v3/typed_struct.proto envoy/extensions/filters/http/fault/v3/fault.proto envoy/service/status/v3/csds.proto envoy/extensions/load_balancing_policies/wrr_locality/v3/wrr_locality.proto envoy/extensions/load_balancing_policies/ring_hash/v3/ring_hash.proto",
+    "generate-types": "proto-loader-gen-types --keepCase --longs String --enums String --defaults --oneofs --includeComments --includeDirs deps/envoy-api/ deps/xds/ deps/googleapis/ deps/protoc-gen-validate/ -O src/generated/ --grpcLib @grpc/grpc-js envoy/service/discovery/v3/ads.proto envoy/service/load_stats/v3/lrs.proto envoy/config/listener/v3/listener.proto envoy/config/route/v3/route.proto envoy/config/cluster/v3/cluster.proto envoy/config/endpoint/v3/endpoint.proto envoy/extensions/filters/network/http_connection_manager/v3/http_connection_manager.proto udpa/type/v1/typed_struct.proto xds/type/v3/typed_struct.proto envoy/extensions/filters/http/fault/v3/fault.proto envoy/service/status/v3/csds.proto envoy/extensions/load_balancing_policies/wrr_locality/v3/wrr_locality.proto envoy/extensions/load_balancing_policies/ring_hash/v3/ring_hash.proto envoy/extensions/load_balancing_policies/pick_first/v3/pick_first.proto",
     "generate-interop-types": "proto-loader-gen-types --keep-case --longs String --enums String --defaults --oneofs --json --includeComments --includeDirs proto/ -O interop/generated --grpcLib @grpc/grpc-js grpc/testing/test.proto",
     "generate-test-types": "proto-loader-gen-types --keep-case --longs String --enums String --defaults --oneofs --json --includeComments --includeDirs proto/ -O test/generated --grpcLib @grpc/grpc-js grpc/testing/echo.proto"
   },