Roll Skia from 86f48da2c812 to a7bcbb9a39f3 (1 revision) (#46128)

https://skia.googlesource.com/skia.git/+log/86f48da2c812..a7bcbb9a39f3

2023-09-21 johnstiles@google.com Revert "Tidy up public.bzl rules for iOS"

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,jonahwilliams@google.com,rmistry@google.com,tdenniston@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://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
diff --git a/DEPS b/DEPS
index 16c71aa..1a9d7e2 100644
--- a/DEPS
+++ b/DEPS
@@ -18,7 +18,7 @@
   'llvm_git': 'https://llvm.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '86f48da2c812dad44a3a4180201a926b93faf34e',
+  'skia_revision': 'a7bcbb9a39f38814919da9b7303a01c11207d031',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.