[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}
diff --git a/modules/video_coding/include/video_coding_defines.h b/modules/video_coding/include/video_coding_defines.h
index 7bbc98f..242edee 100644
--- a/modules/video_coding/include/video_coding_defines.h
+++ b/modules/video_coding/include/video_coding_defines.h
@@ -11,11 +11,14 @@
 #ifndef MODULES_VIDEO_CODING_INCLUDE_VIDEO_CODING_DEFINES_H_
 #define MODULES_VIDEO_CODING_INCLUDE_VIDEO_CODING_DEFINES_H_
 
-#include <string>
-#include <vector>
+#include <stddef.h>
+#include <stdint.h>
 
+#include "absl/types/optional.h"
+#include "api/video/video_content_type.h"
 #include "api/video/video_frame.h"
-#include "modules/include/module_common_types.h"
+#include "api/video/video_timing.h"
+#include "common_types.h"  // NOLINT(build/include)
 
 namespace webrtc {