Roll Skia from 4c5f3ba15510 to 12732e4ad804 (5 revisions)

https://skia.googlesource.com/skia.git/+log/4c5f3ba15510..12732e4ad804

2021-09-24 herb@google.com Reland "remove drawing from ShaderMaskBench ctor"
2021-09-24 johnstiles@google.com Reland "Rewrite switch statements in GLSL strict-ES2 mode."
2021-09-24 johnstiles@google.com Add caps bit for rewriting switch statements.
2021-09-24 jvanverth@google.com Graphite: Add stubs for Gpu and Caps
2021-09-24 brianosman@google.com Revert "remove drawing from ShaderMaskBench ctor"

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 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/186777432
Change-Id: I6fa48a032c295ab4d830c1d689da463f4c325584