Roll external/skia 3de7684fb..980b231f5 (11 commits)

https://skia.googlesource.com/skia.git/+log/3de7684fb..980b231f5

2019-01-09 jcgregorio@google.com Add link to general Google privacy policy.
2019-01-09 halcanary@google.com drawText Cleanup, part 5
2019-01-09 halcanary@google.com drawText Cleanup, part 3
2019-01-09 halcanary@google.com drawText Cleanup, part 4
2019-01-09 halcanary@google.com drawText Cleanup, part 2
2019-01-09 brianosman@google.com Remove SK_LEGACY_TESSELLATOR_CPU_COVERAGE
2019-01-09 rmistry@google.com Remove android framework compile bots from CQ
2019-01-09 halcanary@google.com SkPDF: rasterize for color-filter+layer
2019-01-09 michaelludwig@google.com Don't store local coordinates for solid color quad ops
2019-01-09 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-01-09 dawsonmcoleman@gmail.com Update BUILDCONFIG.gn to support Visual Studio 2017 Enterprise

The AutoRoll server is located here: https://autoroll-internal.skia.org/r/android-master-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

Test: Presubmit checks will test this change.
Change-Id: I1ebb3a841595155e764392af20a99e7d1175c8a5
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.