Roll external/skia 7a13b461e6e0..ee6b49b3af0b (14 commits)

https://skia.googlesource.com/skia.git/+log/7a13b461e6e0..ee6b49b3af0b

2019-11-05 csmartdalton@google.com Add a "conservative raster" flag to GrPipeline and implement in Vulkan
2019-11-05 egdaniel@google.com Add new macro for checking device lost when making Vulkan calls.
2019-11-05 borenet@google.com [recipes] CanvasKit, PathKit, some others don't need bot_update
2019-11-05 ethannicholas@google.com Reland "Implement sample mask and sample locations support in Vulkan"
2019-11-05 mtklein@google.com unify program() and uniforms()
2019-11-05 brianosman@google.com Reland "Fully embrace skcms types in SkColorSpace API"
2019-11-05 bsalomon@google.com Cleanup kGray_8 readback.
2019-11-05 fmalita@chromium.org [skottie] Fix trim path mode interpretation
2019-11-05 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 6c7208f93d6e..67527cb45293 (10 commits)
2019-11-05 fmalita@chromium.org [skottie] Use SkColor4f for gradient color stops
2019-11-05 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-11-05 benjaminwagner@google.com Fail Skpbench on unsupported hardware
2019-11-05 herb@google.com Speed up diff canvas using small bit vector
2019-11-05 mtklein@google.com add color filter support

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 stani@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: Ia13f9aa8fb44b5390c9f1c196da2b35813217d78
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.