[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/event_log_visualizer/main.cc

@@ -8,9 +8,19 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include <stdio.h>
+#include <string.h>
 #include <iostream>
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
 
+#include "logging/rtc_event_log/rtc_event_log.h"
 #include "logging/rtc_event_log/rtc_event_log_parser_new.h"
+#include "modules/audio_coding/neteq/include/neteq.h"
+#include "modules/rtp_rtcp/source/rtcp_packet/report_block.h"
+#include "rtc_base/checks.h"
 #include "rtc_base/flags.h"
 #include "rtc_tools/event_log_visualizer/analyzer.h"
 #include "rtc_tools/event_log_visualizer/plot_base.h"