According to https://www.w3.org/TR/webrtc-stats/#sentrtpstats-dict* and https://tools.ietf.org/html/rfc3550#section-6.4.1, the bytes sent statistic should not include headers or padding. Similarly, according to https://www.w3.org/TR/webrtc-stats/#inboundrtpstats-dict*, bytes received are calculated the same way as bytes sent (eg. not including padding or headers). This change stops adding padding and headers to these statistics. Bug: webrtc:8516,webrtc:10525 Change-Id: I891ad5a11a493cc3212afe93e13f62795bf4031f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/146180 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Steve Anton <steveanton@webrtc.org> Reviewed-by: Henrik Boström <hbos@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Oskar Sundbom <ossu@webrtc.org> Commit-Queue: Bjorn Mellem <mellem@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28647}