Move to_queued_task.h and pending_task_safety_flag.h into public API

Bug: b/235812579
Change-Id: I9fa3dc4a65044df8b44fff4e9bfeac7233fa381c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/266080
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37248}
diff --git a/pc/test/integration_test_helpers.h b/pc/test/integration_test_helpers.h
index 795966e..53df9fc 100644
--- a/pc/test/integration_test_helpers.h
+++ b/pc/test/integration_test_helpers.h
@@ -52,7 +52,9 @@
 #include "api/stats/rtc_stats_report.h"
 #include "api/stats/rtcstats_objects.h"
 #include "api/task_queue/default_task_queue_factory.h"
+#include "api/task_queue/pending_task_safety_flag.h"
 #include "api/task_queue/task_queue_factory.h"
+#include "api/task_queue/to_queued_task.h"
 #include "api/transport/field_trial_based_config.h"
 #include "api/uma_metrics.h"
 #include "api/video/video_rotation.h"
@@ -111,9 +113,7 @@
 #include "rtc_base/rtc_certificate_generator.h"
 #include "rtc_base/socket_address.h"
 #include "rtc_base/ssl_stream_adapter.h"
-#include "rtc_base/task_utils/pending_task_safety_flag.h"
 #include "rtc_base/task_utils/repeating_task.h"
-#include "rtc_base/task_utils/to_queued_task.h"
 #include "rtc_base/test_certificate_verifier.h"
 #include "rtc_base/thread.h"
 #include "rtc_base/thread_annotations.h"