Roll Skia from cbd9bc6f4a7e to 6723859a3212 (2 revisions) (flutter/engine#54342)

https://skia.googlesource.com/skia.git/+log/cbd9bc6f4a7e..6723859a3212

2024-08-05 skia-autoroll@skia-public.iam.gserviceaccount.com Roll SK Tool from 7e62f1428813 to a8b5ec73069a
2024-08-05 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Skia Infra from 4c3759b8afef to 7e62f1428813 (4 revisions)

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,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://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': 'cbd9bc6f4a7eb2bef7c6e015ad699903f8b1779e',
+  'skia_revision': '6723859a321215112e91cc754a24c489e90828cd',
 
   # 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: 258a8e9a36c95a7d8f6a004a3295de80
+Signature: 978c34666cc636a030a3641a27aa09ac
 
 ====================================================================================================
 LIBRARY: etc1