Roll external/skia f8c187c22b48..7e2dea568299 (6 commits)

https://skia.googlesource.com/skia.git/+log/f8c187c22b48..7e2dea568299

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 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/+/master/autoroll/README.md

Test: Presubmit checks will test this change.
Change-Id: Iede2761e101211157dda3c08877c87b1216ee59b
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.