Roll Skia from 5dd88a48f7e2 to b4a893827b2a (3 revisions) (flutter/engine#44470)

https://skia.googlesource.com/skia.git/+log/5dd88a48f7e2..b4a893827b2a

2023-08-07 brianosman@google.com Only skip (BitmapProcState) Init_hsw when building for AVX2+
2023-08-07 skia-autoroll@skia-public.iam.gserviceaccount.com Roll vulkan-deps from 33af718d939e to c46d48f777b7 (5 revisions)
2023-08-07 johnstiles@google.com Disable CommaExpressionsAllowInlining in WebGL2.

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,jacksongardner@google.com,kjlubick@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': '5dd88a48f7e2795a05f138a343dbea3baf16421a',
+  'skia_revision': 'b4a893827b2aff55d43be063e8de8f5b44c75365',
 
   # 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: 83a685d9827469a1c523769f6c843e71
+Signature: 00f567236d70e92eab0195772b83d528
 
 ====================================================================================================
 LIBRARY: etc1