Mark pause_on_unhandled_async_exceptions_test as flaky with optimization_counter_threshold. with optimization_counter_threshold.

Change-Id: Ic9895b8638bf218dab63f42b6d8cc11d37f93dfa
Reviewed-on: https://dart-review.googlesource.com/58782
Reviewed-by: Florian Loitsch <floitsch@google.com>
diff --git a/runtime/observatory/tests/service/service.status b/runtime/observatory/tests/service/service.status
index 7df55a4..aa06e10 100644
--- a/runtime/observatory/tests/service/service.status
+++ b/runtime/observatory/tests/service/service.status
@@ -66,6 +66,9 @@
 dev_fs_http_put_weird_char_test: Skip # Windows disallows carriage returns in paths
 dev_fs_weird_char_test: Skip # Windows disallows question mark in paths
 
+[ $builder_tag == optimization_counter_threshold && $compiler != dartk ]
+pause_on_unhandled_async_exceptions_test: Pass, RuntimeError # Issue 33365
+
 [ $compiler == dart2analyzer && $strong ]
 *: Skip # Issue 28649