Roll Skia from 5f0f9b76b975 to f493d403c01b (3 revisions) (#166710)

https://skia.googlesource.com/skia.git/+log/5f0f9b76b975..f493d403c01b

2025-04-07 jvanverth@google.com De-virtualize some of AtlasSubRun.
2025-04-07 bungeman@google.com Do not add nullptr typeface to cache
2025-04-07 bungeman@google.com [fci] Do not add nullptr typeface to
cache

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 aaclarke@google.com,jlavrova@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

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': '5f0f9b76b975a5c70022a35372bd1618628d3e78',
+  'skia_revision': 'f493d403c01b23887b34299f7f14c949e4d0b8e1',
 
   # 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: 176badfb67cacbb74358d841359bbcc4
+Signature: 99675dc8c5bddcfc6bbe011873ad5444
 
 ====================================================================================================
 LIBRARY: etc1