Roll Skia from 5c60f8a66270 to 064cf12ad0cc (2 revisions) (flutter#175015)

https://skia.googlesource.com/skia.git/+log/5c60f8a66270..064cf12ad0cc

2025-09-05 bungeman@google.com Better bounds check idIndex in ImGuiLayer
2025-09-05 skia-autoroll@skia-public.iam.gserviceaccount.com Roll
vulkan-deps from 05f5847a3f30 to 31fde841db1d (2 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 aaclarke@google.com,kjlubick@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

Author: engine-flutter-autoroll

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': '5c60f8a6627051cc7fefe72ebde91cddbe8a7442',
+  'skia_revision': '064cf12ad0cce462f4c2871ddbe6642746bc91ee',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.