Roll Skia from ecf2f622d0b3 to c464143dfaab (2 revisions) (#50574)

https://skia.googlesource.com/skia.git/+log/ecf2f622d0b3..c464143dfaab

2024-02-12 armansito@google.com [graphite][vello] Incorporate stroke rework changes
2024-02-12 bungeman@google.com Update sbix slide

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 brianosman@google.com,chinmaygarde@google.com,johnstiles@google.com,rmistry@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': 'ecf2f622d0b389c50662a83ef14ff3d902db23d2',
+  'skia_revision': 'c464143dfaab463d553b6f48e73ba6889d1e187f',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: b58ac374301556b58b87879046451b9c
+Signature: f2b8f830da97b72def6ef07c5c710eb6
 
 ====================================================================================================
 LIBRARY: etc1