Also run IWYU on a file picked for testing and check in the result. Bug: none Change-Id: Ide36bc59d126064f2bab7af441f72a6e8477c848 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/280601 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Florent Castelli <orphis@webrtc.org> Cr-Commit-Position: refs/heads/main@{#38481}