Roll external/skia a1d26a807..4b202a3ba (6 commits)

https://skia.googlesource.com/skia.git/+log/a1d26a807..4b202a3ba

2019-06-21 brianosman@google.com ByteCode: Better signature for innerRun, avoid memory stomping
2019-06-21 herb@google.com Simplify intercepts
2019-06-21 fmalita@chromium.org [skottie] Radial swipe effect
2019-06-21 brianosman@google.com ByteCode: Support out params in local function calls
2019-06-21 robertphillips@google.com Cleanup some legacy instantiate calls
2019-06-21 borenet@google.com [infra] Remove stephana@ from OWNERS

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
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Test: Presubmit checks will test this change.
Change-Id: I9aa296e85d13f4d8a6ef62f511ed696c04c7fdb5
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.