Roll Skia from 25a8f601f5fa to 7b6b74ada2bf (5 revisions)

https://skia.googlesource.com/skia.git/+log/25a8f601f5fa..7b6b74ada2bf

2022-07-29 michaelludwig@google.com Fix reference to temporary in GM
2022-07-29 kjlubick@google.com Manual Dawn Roll from bc733f9ee257 to 6fe1f515d4
2022-07-29 johnstiles@google.com Centralize HSL/RGB conversion code.
2022-07-29 kjlubick@google.com Fix Flutter BuildStats job
2022-07-29 kjlubick@google.com [canvaskit] Link with -fno-rtti also

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: Id8b08a1aa4dfe1f7ba8ec5bc05cbdf293acb89e1