Roll Skia from a3a016537a8c to d221c1591d59 (2 revisions) (flutter/engine#52210)

https://skia.googlesource.com/skia.git/+log/a3a016537a8c..d221c1591d59

2024-04-17 johnstiles@google.com Update SkBits2Float and SkFloat2Bits to use uint32_t.
2024-04-17 bungeman@google.com Revert "Roll depot_tools, recipes-py, python 3.11"

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,jsimmons@google.com,michaelludwig@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': 'a3a016537a8c512df42b50522e78710b320c0faf',
+  'skia_revision': 'd221c1591d5939b8a3072769cab9507a7a6ba36c',
 
   # 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: 26ad78ea7476882510a57a09142f458e
+Signature: 85cb6d6be77b045989d4ccce367df949
 
 ====================================================================================================
 LIBRARY: etc1