Remove //rtc_base:refcount from public deps

Bug: webrtc:8603
Change-Id: Ib27a107ae809df739492846175f0e9c4af40d21a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/257910
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Auto-Submit: Florent Castelli <orphis@webrtc.org>
Reviewed-by: Florent Castelli <orphis@webrtc.org>
Commit-Queue: Florent Castelli <orphis@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36447}
diff --git a/modules/async_audio_processing/BUILD.gn b/modules/async_audio_processing/BUILD.gn
index 9330b67..506849d 100644
--- a/modules/async_audio_processing/BUILD.gn
+++ b/modules/async_audio_processing/BUILD.gn
@@ -23,6 +23,7 @@
     "../../api/audio:audio_frame_processor",
     "../../api/task_queue:task_queue",
     "../../rtc_base:checks",
+    "../../rtc_base:refcount",
     "../../rtc_base:rtc_base_approved",
     "../../rtc_base:rtc_task_queue",
   ]