Roll Skia from 32f7fa7bfef3 to c4ba48a7d8c3 (2 revisions)

https://skia.googlesource.com/skia.git/+log/32f7fa7bfef3..c4ba48a7d8c3

2022-01-28 brianosman@google.com Remove (unused) SkBitmapDeviceFilteredSurfaceProps
2022-01-28 johnstiles@google.com Enable Swiftshader for Vulkan testing on Mac.

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 garyq@google.com,robertphillips@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

Author: skia-flutter-autoroll

DEPS

@@ -27,7 +27,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '32f7fa7bfef3456bba991550648677895d8315de',
+  'skia_revision': 'c4ba48a7d8c3dd74b3b546ec6876ed9b5eaffa81',
 
   # 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: 30bbc4aa16b49ab68e88fbc22533f9c7
+Signature: 7b54123e9c073d8976079188dfaeb30f
 
 UNUSED LICENSES: