Roll Skia from 8ecb8dffe00b to 9bc5eeb93a1e (7 revisions)

https://skia.googlesource.com/skia.git/+log/8ecb8dffe00b..9bc5eeb93a1e

2023-09-20 johnstiles@google.com Migrate Apple test disables into SkSLTest.cpp.
2023-09-20 johnstiles@google.com Migrate Intel test disables into SkSLTest.cpp.
2023-09-20 michaelludwig@google.com [skif] Use optionals to track unbounded input/output bounds
2023-09-20 robertphillips@google.com [graphite] Use Compose helper to implement dithering
2023-09-20 kjlubick@google.com Revert "[Fontations] Test path equivalence for a set of test fonts and strings"
2023-09-20 skia-autoroll@skia-public.iam.gserviceaccount.com Manual roll Dawn from bc9a66c04290 to 881dc3bb55fd (7 revisions)
2023-09-20 drott@chromium.org [Fontations] Test path equivalence for a set of test fonts and strings

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://skia-autoroll.corp.goog/r/android-master-autoroll
Please CC djsollen@google.com,rmistry@google.com,scroggo@google.com on the revert to ensure that a human
is aware of the problem.

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

Test: Presubmit checks will test this change.
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.
Bug: b/40040586
Bug: b/40040615
Bug: b/40044139
Bug: b/186777432
Change-Id: Ie3a6a2c38b441ed901cbbc402a7138469b4e42cb