Use updated Skia APIs that take a span

The older (non-span) APIs are still exposed, but guarded with
SK_SUPPORT_UNSPANNED_APIS -- and soon enough that guard will be
removed, so working to use the new calls now.

Change-Id: Ie7c46dfa0f84c3dcc9200356d51f914dcdf9e4d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6633310
Owners-Override: Nico Weber <thakis@chromium.org>
Reviewed-by: Maggie Chen <magchen@chromium.org>
Reviewed-by: Keren Zhu <kerenzhu@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1473647}