Roll Skia from fca8fac08117 to 475f07f5ca14 (2 revisions) (flutter/engine#44896)

https://skia.googlesource.com/skia.git/+log/fca8fac08117..475f07f5ca14

2023-08-21 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ANGLE from 78de02ab5230 to 3479f4a1807b (29 revisions)
2023-08-21 skia-autoroll@skia-public.iam.gserviceaccount.com Roll SK Tool from 572e236a3608 to bb6b2fe4c19b

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 armansito@google.com,brianosman@google.com,jsimmons@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://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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': 'fca8fac08117df68c5342efab36b95003e1e52c6',
+  'skia_revision': '475f07f5ca1493c431dcb393cbb4cdb452cc1b31',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.