Use SequenceChecker from public API

Bug: webrtc:12419
Change-Id: I00cca16a0ec70246156ba00b97aa7ae5ccbf5364
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/205323
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33220}
diff --git a/pc/jitter_buffer_delay.cc b/pc/jitter_buffer_delay.cc
index 8863584..3fdf823 100644
--- a/pc/jitter_buffer_delay.cc
+++ b/pc/jitter_buffer_delay.cc
@@ -10,10 +10,10 @@
 
 #include "pc/jitter_buffer_delay.h"
 
+#include "api/sequence_checker.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/numerics/safe_conversions.h"
 #include "rtc_base/numerics/safe_minmax.h"
-#include "rtc_base/synchronization/sequence_checker.h"
 #include "rtc_base/thread.h"
 
 namespace {