Roll Skia from bf4f2763b6e6 to a465876e3156 (5 revisions) (flutter#184068)

https://skia.googlesource.com/skia.git/+log/bf4f2763b6e6..a465876e3156

2026-03-24 michaelludwig@google.com [graphite] Avoid nan conversion in
channel_to_bits in TextureFormatTest
2026-03-24
recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com
Roll recipe dependencies (trivial).
2026-03-24 drott@chromium.org [Fontations] Roll Fontations
2026-03-24
recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com
Roll recipe dependencies (trivial).
2026-03-24 michaelludwig@google.com Revert "[graphite] Stop using NaN in
TextureFormatTest for padding"

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 codefu@google.com,kjlubick@google.com,michaelludwig@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

@@ -15,7 +15,7 @@ vars = {
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': 'bf4f2763b6e6e08aadaf2d79b0c578028b34507d',
+  'skia_revision': 'a465876e3156ebec198165188002b3d5e2a0cdb1',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.