[Cleanup] Add missing #include. Remove useless ones. IWYU part 2.

This is a follow-up to
https://webrtc-review.googlesource.com/c/src/+/106280.
This time the whole code base is covered.
Some files may have not been fixed though, whenever the IWYU tool
was breaking the build.

Bug: webrtc:8311
Change-Id: I2c31f552a87e887d33931d46e87b6208b1e483ef
Reviewed-on: https://webrtc-review.googlesource.com/c/111965
Commit-Queue: Yves Gerey <yvesg@google.com>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25830}

rtc_tools/frame_editing/frame_editing_unittest.cc

@@ -9,11 +9,12 @@
  */
 
 #include <stdio.h>
-#include <stdlib.h>
-
+#include <string.h>
 #include <fstream>
 #include <memory>
+#include <string>
 
+#include "common_types.h"  // NOLINT(build/include)
 #include "common_video/libyuv/include/webrtc_libyuv.h"
 #include "rtc_tools/frame_editing/frame_editing_lib.h"
 #include "test/gtest.h"