Mark pkg/analysis_server/test/socket_server_test as slow on jsshell

pkg/pkg.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Don't run any test-like files that show up in packages directories. It
 # shouldn't be necessary to run "pub install" in these packages, but if you do
 # it shouldn't break the tests.
 */packages/*/*: Skip
 */*/packages/*/*: Skip
 */*/*/packages/*/*: Skip
@@ skipping 139 matching lines @@
 analysis_server/index/store/codec_test: Pass, Slow # Issue 19756
 
 [ $runtime == jsshell ]
 analysis_server/test/edit/refactoring_test: Pass, Slow # Issue 16473, 19756
 analysis_server/test/analysis_notification_occurrences_test: Pass, Slow # Issue 16473, 19756
 analysis_server/test/analysis_notification_outline_test: Pass, Slow # Issue 16473, 19756
 analysis_server/test/analysis_notification_navigation_test: Pass, Slow # Issue 16473, 19756
 analysis_server/test/domain_analysis_test: Pass, Slow # Issue 16473, 19756
 analysis_server/test/analysis_notification_highlights_test: Pass, Slow # 16473, 19756
 analysis_server/test/search/top_level_declarations_test: Pass, Slow # 16473, 19756
+analysis_server/test/socket_server_test: Pass, Slow # Issue 16473, 19756
 analyzer/test/generated/element_test: Pass, Slow # Issue 16473
 
 [ $runtime == d8 || $runtime == jsshell ]
 stack_trace/test/chain_test: Fail # Issues 15171 and 15105
 stack_trace/test/vm_test: RuntimeError, OK # VM-specific traces
 unittest/test/missing_tick_test: Fail # Timer interface not supported: dartbug.com/7728.
 
 [ $runtime == jsshell ]
 async/test/stream_zip_test: RuntimeError, OK # Timers are not supported.
 scheduled_test/test/unittest_compatibility_test: Fail # Issue 7728
@@ skipping 296 matching lines @@
 third_party/angular_tests/browser_test/change_detection/dirty_checking_change_detector: Skip # Issue 17152
 
 [ $use_repository_packages ]
 analyzer/test/*: PubGetError
 
 [ $runtime == drt ]
 http/test/html/client_test: Skip # Issue 18566
 
 [ $system == windows ]
 analysis_server/test/integration/search/get_type_hierarchy_test: Pass, Fail # Issue 20436