Roll Skia from 6b719c25cade to d977fdecc634 (4 revisions)

https://skia.googlesource.com/skia.git/+log/6b719c25cade..d977fdecc634

2021-05-13 bsalomon@google.com Re-disable indirect draw on ANGLE D3D
2021-05-13 bsalomon@google.com limit transfer buffer workaround to angle d3d backend
2021-05-13 robertphillips@google.com Revert "Use conics with w=Inf to describe triangles for the tessellator"
2021-05-13 robertphillips@google.com Revert "Delete the index buffer from middle-out tessellation"

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/+doc/master/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: I91e4bbbc17881085b72236ce6d6a3cdc215649bc