Roll Skia from c67d061a9101 to 87424d66edba (6 revisions) (#191375)

https://skia.googlesource.com/skia.git/+log/c67d061a9101..87424d66edba

2026-08-19 thomsmit@google.com [graphite] LCM across storage attributes
2026-08-19 thomsmit@google.com [graphite] SkSLBench fixes
2026-08-19 fmalita@google.com [canvaskit] Update metadata for 0.42.0
2026-08-19 kjlubick@google.com Update skottie-base
2026-08-19 nathanasanchez@google.com [Graphite] Fix VerticesRenderStep
to properly handle triangle strips
2026-08-19 thomsmit@google.com [graphite] Add Storage Attributes to
Rendersteps

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC
awolff@google.com,kjlubick@google.com,robertphillips@google.com on the
revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Flutter:
https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md