The fuchsia code around metrics and sizing was just sending this
information through a side-channel, when the engine already had the
information available. So, delete all of it to make future CLs simpler.

Additionally, the SceneUpdateContext has many unneccesary dependencies
re: metrics and PaintTasks. Break those to make future CLs simpler.

Tested: Ran all unittests and ran workstation on Fuchsia
BUG: 53062, 53063

* Implement Clipboard hasStrings method on iOS

* Test call to hasStrings

* Formatting fixes

* Move test to its own file

* Alphabetical order

* Update licenses

* arguments nil instead of empty dictionary

* Guarantee hasStrings will be true when tested

* Formatting

https://skia.googlesource.com/skia.git/+log/7225788b9070..8e77631a80f0

2020-07-31 borenet@google.com Remove some non-inclusive language in recipes
2020-07-31 scroggo@google.com Remove "sanity"/"insane" to comply with Android's inclusive language guidance
2020-07-31 scroggo@google.com Remove "dummy" to comply with Android's inclusive language guidance
2020-07-31 jdapena@igalia.com GCC: fix type passed to vcvt_f32_f16 to be a float16x4_t in SkVx.h
2020-07-31 scroggo@google.com Remove "Cripple" to comply with Android's inclusive language guidance
2020-07-31 fmalita@chromium.org Fix path builder initial gen ID
2020-07-31 ethannicholas@google.com Fixed nondeterminism in SkSL dehydration
2020-07-31 robertphillips@google.com Handle null GrDirectContext in DDL Fuzzer

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC borenet@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

* increase number of shards. make engine web tests same as flutter repo tests

* remove golden arguments. tests failed

* adding comments

P0 bug fix