[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/rtp_rtcp/source/tmmbr_help.h b/modules/rtp_rtcp/source/tmmbr_help.h
index 91aeaf4..bf86f65 100644
--- a/modules/rtp_rtcp/source/tmmbr_help.h
+++ b/modules/rtp_rtcp/source/tmmbr_help.h
@@ -11,7 +11,9 @@
 #ifndef MODULES_RTP_RTCP_SOURCE_TMMBR_HELP_H_
 #define MODULES_RTP_RTCP_SOURCE_TMMBR_HELP_H_
 
+#include <stdint.h>
 #include <vector>
+
 #include "modules/rtp_rtcp/source/rtcp_packet/tmmb_item.h"
 
 namespace webrtc {