Roll Skia from 94d6e955d221 to b5f614a8521b (4 revisions)

https://skia.googlesource.com/skia.git/+log/94d6e955d221..b5f614a8521b

2023-08-15 scroggo@google.com Update Android Viewer app instructions
2023-08-15 nicolettep@google.com Consider external format when determining whether YCBCR information is valid
2023-08-15 johnstiles@google.com Add nanobench entries for Graphite Metal/WGSL large shaders.
2023-08-15 bungeman@google.com Reland "[skunicode] Consolidate SkUnicode_IcuBidi"

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,nscobie@google.com,rmistry@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/292023877
Bug: b/186777432
Change-Id: Iaa27a127016b589dc3202d7c421513059b9cac9e