Roll Skia from 8167ff71af2c to 946ca24d03ab (2 revisions) (#54202)

https://skia.googlesource.com/skia.git/+log/8167ff71af2c..946ca24d03ab

2024-07-30 johnstiles@google.com Add defensive check for unreachable specialized functions.
2024-07-29 johnstiles@google.com Move most KnownRuntimeEffects into the sksl_rt_shader module.

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,johnstiles@google.com,jonahwilliams@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

Author: skia-flutter-autoroll

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': '8167ff71af2cf61b7513e726a15664e524fade19',
+  'skia_revision': '946ca24d03ab131a25cc71b91c7662777d0f5a58',
 
   # 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: 9298d8b32c15830b29dc2ffb71beca39
+Signature: 2ca006daae271dac4a603e7c60140deb
 
 ====================================================================================================
 LIBRARY: etc1