[Cleanup] Add missing #include. Remove useless ones.

This CL is the result of running include-what-you-use tool on part
of the code base (audio target and dependencies) plus manual fixes.

bug: webrtc:8311
Change-Id: I277d281ce943c3ecc1bd45fd8d83055931743604
Reviewed-on: https://webrtc-review.googlesource.com/c/106280
Commit-Queue: Yves Gerey <yvesg@google.com>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25311}
diff --git a/modules/audio_processing/echo_control_mobile_impl.h b/modules/audio_processing/echo_control_mobile_impl.h
index a5b66c8..6d49ef7 100644
--- a/modules/audio_processing/echo_control_mobile_impl.h
+++ b/modules/audio_processing/echo_control_mobile_impl.h
@@ -11,14 +11,15 @@
 #ifndef MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
 #define MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
 
+#include <stddef.h>
+#include <stdint.h>
 #include <memory>
 #include <vector>
 
-#include "modules/audio_processing/include/audio_processing.h"
-#include "modules/audio_processing/render_queue_item_verifier.h"
+#include "api/array_view.h"
 #include "rtc_base/constructormagic.h"
 #include "rtc_base/criticalsection.h"
-#include "rtc_base/swap_queue.h"
+#include "rtc_base/thread_annotations.h"
 
 namespace webrtc {