spanification: Add `#pragma allow_unsafe_buffers` to media/*

This is a preparation to fix each files.
This CL has no behavior changes.

This patch was fully automated using script:
https://paste.googleplex.com/5614491201175552

Note that in patchset2, change to:
/build/config/unsafe_buffers_paths.txt
was reverted. Indeed, running too many (~3) CQ run touching this file is
making the builder cache much slower. I will bundle every change to this
file in a subsequent CL. I will limit myself to 1-2 CQ run per day.

See internal doc about it:
https://docs.google.com/document/d/1erdcokeh6rfBqs_h0drHqSLtbDbB61j7j3O2Pz8NH78/edit?resourcekey=0-hNe6w1hYAYyVXGEpWI7HVA&tab=t.0

Bug: 40285824
Change-Id: Icf5fbd798c3587f6c66a5980bb8f273d233a5329
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5717952
Auto-Submit: Arthur Sonzogni <arthursonzogni@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1334475}
NOKEYCHECK=True
GitOrigin-RevId: 9c1d4b495c1ebadeda004c9b741e11a6f035b9e7
14 files changed