Roll Skia from dca47129cf2e to f784f78a5669 (3 revisions) (#57242)

https://skia.googlesource.com/skia.git/+log/dca47129cf2e..f784f78a5669

2024-12-17 fmalita@google.com [svg writer] Add support for radial and 2pt conical gradients
2024-12-17 fmalita@google.com [svg writer] Clean up addShaderResources
2024-12-17 skia-autoroll@skia-public.iam.gserviceaccount.com Roll vulkan-deps from 8d4040d12fd2 to dbec774c7f68 (6 revisions)

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 egdaniel@google.com,jacksongardner@google.com,kjlubick@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