Roll Skia from 245d2b8fb042 to 7d56b9cc7ce9 (2 revisions) (flutter#166737)

https://skia.googlesource.com/skia.git/+log/245d2b8fb042..7d56b9cc7ce9

2025-04-08 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn
from fbd6b201958b to 33862a3ffc8a (14 revisions)
2025-04-08 skia-autoroll@skia-public.iam.gserviceaccount.com Roll
SwiftShader from 4982425ff1bd to 2b323370501c (1 revision)

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,jlavrova@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': '245d2b8fb04212b4b7f122f02438a1f0ac62141e',
+  'skia_revision': '7d56b9cc7ce95828f7e2afa692483b78a820af2e',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.