[roll] Roll fuchsia Reland "[flatland] CpuRenderer improvements."

This reverts commit 7bf4078ea1d1646251f4e7082fc266217b0c920f.

Reason for revert: removed unnecessary CHECK, which was the cause of the previous revert.

Original change's description:
> Revert "[flatland] CpuRenderer improvements."
>
> This reverts commit 6b6d80bff71810b37c7400d6a46ed76895e3e3a4.
>
> Reason for revert: b/363281956
>
> Original change's description:
> > [flatland] CpuRenderer improvements.
> >
> > Improve performance of inner loop by avoiding std::vector heap
> > allocations.
> >
> > Check that that inner loop copies the correct number of bytes per pixel.
> >
> > Replace DCHECK with CHECK.  These are outside of the inner loop, so
> > don't have a performance impact.
> >
> > Original-Bug: 361548290
> > Change-Id: Ife680f5bceb4523fa77e0ed26df090e0a0910847
> > Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1108577
> > Reviewed-by: Caroline Liu <carolineliu@google.com>
> > Reviewed-by: Emircan Uysaler <emircan@google.com>
> > Reviewed-by: Marco Vanotti <mvanotti@google.com>
> > Commit-Queue: Josh Gargus <jjosh@google.com>
>
> Original-Bug: 361548290
> Change-Id: I44b4f8a2f2579d27da6e5f84ccbd09d35b41a87f
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1110003
> Reviewed-by: RubberStamper 🤖 <android-build-ayeaye@system.gserviceaccount.com>
> Commit-Queue: Yegor Pomortsev <ypomortsev@google.com>

Original-Bug: 361548290
Original-Bug: 364330948
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1111819
Original-Revision: dea05c2579ff945a60c928e7e18207bd641608f4
GitOrigin-RevId: ac9b3701384a9b118bc151836ed167e241d86bef
Change-Id: I7abdb09ccd89e151b6a9f96541a894d9151b5f20