Roll Skia from e9ac244d61b2 to ba4721319a92 (1 revision) (flutter/engine#39170)

https://skia.googlesource.com/skia.git/+log/e9ac244d61b2..ba4721319a92

2023-01-26 herb@google.com Convert prepareForSDFTDrawing to shared code

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 nicolettep@google.com,zra@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': 'e9ac244d61b2376f75d4aa5978f333df6cd5e148',
+  'skia_revision': 'ba4721319a926fb01dc5ec19ef477cdf523aef34',
 
   # 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: c1d5876c33acfd9900edd7f43c8e6fcc
+Signature: ff83b6b69513b4abae37ff07256bb592
 
 ====================================================================================================
 LIBRARY: etc1