Makes InvokeMethod's reply a high-level response object, rather than
binary data, matching the abstraction level of the class (and the other
languages' implementations).

In support of that:
- Adds the logic to the codecs to decode response envelopes, which had
  never been implemented.
- Adds a convience implementation of MethodResult that forwards to
  lambdas, so that one-off invocation handlers are easier to write.

Also simplified BinaryMessenger's API so that subclasses only need to
implement one version of Send, rather than two almost-identical versions.

Fixes https://github.com/flutter/flutter/issues/53223

The BaseInputConnection superclass does not call endBatchEdit
in setSelection and therefore does not implicitly cause
InputConnectionAdaptor to send a state update.

Some input modes such as numeric keypads will not function without
these updates.

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

Some cirrus tasks are also running on LUCI. We are removing duplicated
tasks to free up cirrus capacity.

https://github.com/flutter/flutter/issues/54412

fx_log_init was already a no-op, and was eliminated in the latest
Fuchsia SDK.

See: https://fuchsia.googlesource.com/fuchsia/+/47e568475f535c00f53c86e19ff4d8736a7b261f

Fixes https://github.com/flutter/flutter/issues/53117

Test added:
- ShellTest.CanLoadSkSLsFromAsset

Rolls buildroot to enable sysroot for Linux host builds by default.

Part of flutter/flutter#53176

* Revert getSystemGestureExclusionRects and setSystemGestureExclusionRects 

* Remove references to removed PlatformChannelTest.java file

Fuchsia is the main consumer of these CIPD packages and - to simplify
its infrastructure - it is migrating its SDK partners over to producing
a CIPD package containing a flat .build-id directory.

This change also updates the CIPD package so that the .build-id
directory is placed at the root.

Bug: fxbug.dev/41443

This was originally added in 3c1c3e26 as
a means of avoiding running framework tests if they're known to be
failing, but given how flaky Cirrus infrastructure has historically
been, the number of false positives is too high.

https://dart.googlesource.com/sdk.git/+log/28c4c6c156e5..114752421dca

git log 28c4c6c156e5..114752421dca --date=short --first-parent --format='%ad %ae %s'
2020-04-08 srujzs@google.com [dart:html] Remove multitest usage in some js tests
2020-04-08 jcollins@google.com Switch migration to the isolate client.
2020-04-08 jwren@google.com Follow up on https://dart-review.googlesource.com/c/sdk/+/142705 to fix the assertion in the new completions in FieldDeclarations
2020-04-08 rmacnak@google.com [vm, service] Explicitly mention that timeline events are not ordered.
2020-04-08 rnystrom@google.com Migrate language_2/factory to NNBD.
2020-04-08 rnystrom@google.com Migrate language_2/field to NNBD.
2020-04-08 nshahan@google.com [ddc] Run modular test suite in weak mode
2020-04-08 sra@google.com [js_runtime] Streamline String.fromCharCodes
2020-04-08 joshualitt@google.com [dart2js] Always compute platform binaries.
2020-04-08 scheglov@google.com Issue 41399. Check for 'dynamic' and 'Never' when verifying EXPORT_LEGACY_SYMBOL.
2020-04-08 scheglov@google.com Make all named parameters of BestPracticesVerifier required.
2020-04-08 brianwilkerson@google.com Update code_metrics to support running it over a corpus
2020-04-08 scheglov@google.com Support for analysis options in FileResolver.
2020-04-08 scheglov@google.com Remove the special case for getGreatestLowerBound() in inference.
2020-04-08 scheglov@google.com Don't report MISSING_DEFAULT_VALUE_FOR_PARAMETE for external factory constructors.
2020-04-08 kustermann@google.com Revert "Reland "[vm, gc] Parallel scavenge.""
2020-04-08 kustermann@google.com [vm/compiler] Use pc-relative calls to various stubs by moving the stubs to the isolate

Created with:
  gclient setdep -r src/third_party/dart@114752421dca

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

Bug: None
Tbr: dart-vm-team@google.com

This rolls DEPS to pick up the new buildroot sysroot scripts, and uses
them to download a sysroot on Linux. The sysroot isn't yet used by
default; that will be added in a later PR.

Part of https://github.com/flutter/flutter/issues/53176

https://skia.googlesource.com/skia.git/+log/f6860405e1bf..8561fc23c927

git log f6860405e1bf..8561fc23c927 --date=short --first-parent --format='%ad %ae %s'
2020-04-08 egdaniel@google.com Update gpu flush semaphore contract.
2020-04-08 senorblanco@chromium.org Dawn: staging manager rewrite.
2020-04-08 fmalita@chromium.org [SVG] Fix spec links
2020-04-08 mtklein@google.com stifle leaks in terminator_CreateDevice()
2020-04-08 mtklein@google.com get skvm/llvm building again
2020-04-08 mtklein@google.com narrow use of fast_unwind_on_malloc=0
2020-04-08 mtklein@google.com shard ASAN bonusconfigs bot

Created with:
  gclient setdep -r src/third_party/skia@8561fc23c927

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 csmartdalton@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

Bug: None
Tbr: csmartdalton@google.com

This reverts commit f6b8eda7.

* adding an apple script to quit safari

* making changes to utils and adding cleanup after unit tests failed

* switch saai quit to pkill instead of applescript

* adding toolexception

* adding a cleanup function option to felt.

* removing unnecassary await's added for the previos version of the PR

* removing unnecassary async

* fix analyze error

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