Apply the xds-specific Bazel rule to admin API (#25799)

BUILD

@@ -2630,7 +2630,7 @@ grpc_cc_library_xds(
     alwayslink = 1,
 )
 
-grpc_cc_library(
+grpc_cc_library_xds(
     name = "grpcpp_admin",
     srcs = [
         "src/cpp/server/admin/admin_services.cc",

test/cpp/end2end/BUILD

@@ -874,7 +874,7 @@ grpc_cc_test(
     ],
 )
 
-grpc_cc_test(
+grpc_cc_test_xds(
     name = "admin_services_end2end_test",
     srcs = ["admin_services_end2end_test.cc"],
     external_deps = [

test/cpp/end2end/admin_services_end2end_test.cc

@@ -21,7 +21,6 @@
 
 #include "absl/strings/str_cat.h"
 
-#include <grpcpp/ext/admin_services.h>
 #include <grpcpp/ext/proto_server_reflection_plugin.h>
 #include <grpcpp/grpcpp.h>
 
@@ -29,6 +28,9 @@
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
+#ifndef DISABLED_XDS_PROTO_IN_CC
+#include <grpcpp/ext/admin_services.h>
+
 namespace grpc {
 namespace testing {
 
@@ -95,6 +97,8 @@ TEST_F(AdminServicesTest, XdsDisabled) {
 }  // namespace testing
 }  // namespace grpc
 
+#endif  // DISABLED_XDS_PROTO_IN_CC
+
 int main(int argc, char** argv) {
   grpc::testing::TestEnvironment env(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);