Roll Skia from 461256aac224 to 50346ff52bbb (1 revision) (flutter/engine#48900)

https://skia.googlesource.com/skia.git/+log/461256aac224..50346ff52bbb

2023-12-11 jvanverth@google.com [graphite] Add precompile method for YUVImageShaders

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,michaelludwig@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

@@ -18,7 +18,7 @@ vars = {
   'llvm_git': 'https://llvm.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '461256aac224a3c2ffda3abb9ef510fc66b3a428',
+  'skia_revision': '50346ff52bbbb2e32a4cd1ba8ef45dae9ae55f34',
 
   # 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: c4324b6fd67943d9d2f413c587ab64fc
+Signature: 04b399007827e8ed576ce11245db74b8
 
 ====================================================================================================
 LIBRARY: etc1