IWYU rtc_tools (again)

with the previously excluded sanitizers_unittest.cc

Bug: webrtc:42226242
Change-Id: I342d60dad6c3c061d9a470ce93cc2fa58e5aae60
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/399140
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Philipp Hancke <phancke@meta.com>
Reviewed-by: Jeremy Leconte <jleconte@google.com>
Cr-Commit-Position: refs/heads/main@{#45105}
diff --git a/rtc_tools/sanitizers_unittest.cc b/rtc_tools/sanitizers_unittest.cc
index 3169ead..64974cf 100644
--- a/rtc_tools/sanitizers_unittest.cc
+++ b/rtc_tools/sanitizers_unittest.cc
@@ -8,16 +8,14 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include <stddef.h>
-#include <stdio.h>
+#include <cstddef>
+#include <memory>  // IWYU pragma: keep
+#include <random>  // IWYU pragma: keep
 
-#include <memory>
-#include <random>
-
-#include "rtc_base/checks.h"
-#include "rtc_base/null_socket_server.h"
-#include "rtc_base/thread.h"
-#include "test/gtest.h"
+#include "rtc_base/checks.h"              // IWYU pragma: keep
+#include "rtc_base/null_socket_server.h"  // IWYU pragma: keep
+#include "rtc_base/thread.h"              // IWYU pragma: keep
+#include "test/gtest.h"                   // IWYU pragma: keep
 
 namespace webrtc {