Roll Skia from f8d5ecc7841d to ff1eb5af6ce4 (2 revisions) (flutter#51322)

https://skia.googlesource.com/skia.git/+log/f8d5ecc7841d..ff1eb5af6ce4

2024-03-11 drott@chromium.org [Fontations-backend] Fix y-inversion in CFF curve drawing.
2024-03-11 jvanverth@google.com [graphite] Clean up DrawAtlas::updatePlot().

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,fmalita@google.com,rmistry@google.com,zra@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: skia-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': 'f8d5ecc7841de18b6663a1d802d7a8a1c2362ab3',
+  'skia_revision': 'ff1eb5af6ce4ff6147366bce77f4a959661ab5da',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 7f41043bd0ea95d722a9cb081ff172b7
+Signature: f0ff62ebc4e848f1835a459c3c733ae6
 
 ====================================================================================================
 LIBRARY: etc1