Roll Skia from 54b7bd33a116 to 8d55cab6bd90 (8 revisions)

https://skia.googlesource.com/skia.git/+log/54b7bd33a116..8d55cab6bd90

2021-11-18 brianosman@google.com Revert "Remove layer-coverage-tracking experiment"
2021-11-18 johnstiles@google.com Assign unique per-pixel device coordinates in SkVM instead of all-zero.
2021-11-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from e068963d1dcf to 4c687cc2f8ea (2 revisions)
2021-11-18 johnstiles@google.com Force the SkVM interpreter if trace opcodes are encountered.
2021-11-18 johnstiles@google.com Move SkDebugfStream into SkStreamPriv.
2021-11-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Chromium from e6803bcb1fd5 to ca9862fcfe55 (500 revisions)
2021-11-18 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn from 8ce15b3ce97e to 67e1e9c199cc (7 revisions)
2021-11-17 brianosman@google.com Remove layer-coverage-tracking experiment

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 nifong@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: I95a04a0b3cee2535f0e2a979d21abc9200105180