Roll Skia from 3db026d62805 to d6d1feba94d9 (2 revisions) (flutter/engine#56917)

https://skia.googlesource.com/skia.git/+log/3db026d62805..d6d1feba94d9

2024-12-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Skia Infra from 963fb6511438 to 667c4e94b4a5 (4 revisions)
2024-12-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn from dbff5894310b to ecd0b68434f4 (18 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 jvanverth@google.com,kjlubick@google.com,zra@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

DEPS

@@ -14,7 +14,7 @@ vars = {
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': '3db026d62805afc2b8ba44de25ebec3154062115',
+  'skia_revision': 'd6d1feba94d9e78f30378654b37b5f8e687c3eb7',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

engine/src/flutter/ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 479a9c959336bf30d99414a1ffdf0b21
+Signature: 8e9b4d383a59c9eadbe36c303b27e882
 
 ====================================================================================================
 LIBRARY: etc1