Revert "IWYU modules/video_capture/"

This reverts commit 55b5f0e429a572aabb28ab3b078f19a4365c1028.

Reason for revert: breaks downstream projects.

Bug: webrtc:42226242
Original change's description:
> IWYU modules/video_capture/
>
> without platform-specific subdirectories first. Done
> using
>   ls modules/video_capture/*.{h,cc} | xargs tools_webrtc/iwyu/apply-include-cleaner | xargs tools_webrtc/iwyu/apply-include-cleaner
> followed by
>   tools_webrtc/gn_check_autofix.py -C out/Default/
> and git cl format
>
> Manual changes:
> - video_capture_impl.cc: use C++ headers
>
> Bug: webrtc:42226242
> Change-Id: I2477021f0cfd9045cae4c5a789c4983a194ef7ef
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/391262
> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
> Commit-Queue: Philipp Hancke <phancke@meta.com>
> Cr-Commit-Position: refs/heads/main@{#44628}

Bug: webrtc:42226242
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: If01a94c3699bc7d4bdadd23fef0416685544b191
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/391720
Reviewed-by: Jeremy Leconte <jleconte@google.com>
Owners-Override: Ilya Nikolaevskiy <ilnik@webrtc.org>
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#44632}