Reland "unzip_service: Add support for decompressing xz files."

This is a reland of commit 4f54359a8860a911ffd3e8238bb283ceed4e7e36

Original change's description:
> unzip_service: Add support for decompressing xz files.
>
> This will be used by components/update_client in a future CL.
>
> Bug: 399619105
> Change-Id: I940a857bcecf8dc722eb68d1467adfceb6c7b7bd
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6378645
> Commit-Queue: Joshua Pawlicki <waffles@chromium.org>
> Reviewed-by: Will Harris <wfh@chromium.org>
> Reviewed-by: Greg Thompson <grt@chromium.org>
> Reviewed-by: Sorin Jianu <sorin@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1437403}

Bug: 399619105
Change-Id: I916e8e0c951ed30f81e0281e65bfa7c53d9f3b0a
Cq-Include-Trybots: luci.chromium.try:fuchsia-arm64-cast-receiver-rel
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6391176
Reviewed-by: Greg Thompson <grt@chromium.org>
Reviewed-by: Giovanni Ortuno Urquidi <ortuno@chromium.org>
Commit-Queue: Joshua Pawlicki <waffles@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1438185}