Roll Skia from 1b2d815e9778 to fff6c987d803 (2 revisions) (#39823)

https://skia.googlesource.com/skia.git/+log/1b2d815e9778..fff6c987d803

2023-02-23 scroggo@google.com Update SkSL tests to be enforced on U
2023-02-23 ccameron@chromium.org SkJpegCodec: Move more constants to SkJpegConstants.h

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,chinmaygarde@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://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

Author: skia-flutter-autoroll

DEPS

@@ -18,7 +18,7 @@ vars = {
   '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': '1b2d815e97786db2bf563f993beb0bbf26d8bb8e',
+  'skia_revision': 'fff6c987d803952b5623a21fc16726a845b21d66',
 
   # 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: 5518d75b61a27cc1556f2f3b7efeaf4e
+Signature: 01b927ea0071e18ad918d81df4496e66
 
 ====================================================================================================
 LIBRARY: etc1