* [fuchsia] fix Rasterizer::ScreenshotLayerTreeAsPicture on Fuchsia

* [fuchsia] Add shell test for skp based shader warmup

* [fuchsia] use custom image serialization when writing out SKP's

This change adds custom image serialization functions for skp serialization
which write out onlythe image metadata and not the contents of the
images themselves. This allows SKP's to be used for shader warmup with
a significantly reduced disk space footprint.

https://skia.googlesource.com/skia.git/+log/c97ebe06dc1d..f2d90659ff1a

2020-07-17 fmalita@chromium.org [skottie] Fix analytical mask fill type
2020-07-17 johnstiles@google.com Add an input FP to the GrProcessorTestData.
2020-07-17 robertphillips@google.com Clean up some GrContext uses in the GMs
2020-07-17 adlai@google.com Remove two unused deprecated SkImage functions
2020-07-17 nifong@google.com fix heap-buffer-overflow by not returning string from reportBackendType
2020-07-17 brianosman@google.com fuzz: Add 'loops' option to run multiple times
2020-07-17 westont@google.com Add updated provisioning_profile_ios that includes iphone 11s.
2020-07-17 herb@google.com create SkAtlasSubRun API subclass SkMaskSubRun
2020-07-17 herb@google.com make prepareGrGlyphs private
2020-07-17 herb@google.com remove unused calls: grGlyph and quadOffset

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 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/master/autoroll/README.md

* remove obsolete check

* FML_DCHECK flutter_view_ in methods that actually use it

Adds new package:sse dependency

1e78bd069e [ package:dds ] Add missing package:shelf_static dependency in pubspec.yaml
51d3fae7d3 Revert "Move `BytesBuilder` class and implementation to `dart:typed_data`."
e7b319698d [ package:dds ] Add server-sent event (SSE) support to DDS
d4ac7066b7 Improve diagnostic message when short circuiting (issue 42599)
7960ad545a [ Service ] Fix line numbers in step_through_mixin_from_sdk_test
505fca1ce5 [ package:dds ] Fix issue where StateError could be thrown if DDS shuts down with in-flight requests
47b080de23 [vm/nnbd] Do not check if NNBD experimental flag is enabled for non-null assertions
ef147c0a95 Issue 42699. Stop reporting EXPORT_DUPLICATED_LIBRARY_NAMED and IMPORT_DUPLICATED_LIBRARY_NAMED.
0cc2d9685a [vm] Fix --use-bare-instructions=false on simarm_x64.
6fc75e6a2b [vm] Add tests and packages to the Fuchsia package
a2edb7976c Make CiderCacheEntry public.
4726b1b337 [infra] Update Chrome used in testing to version 84