* changing felt script to fetch flutter

* changing the clone_flutter.sh code

* running integration tests with felt on cirrus. fetch framework in CI (not in local).

* only run cirrus tests on chrome. fix a comma in the flutter command path

* adding comments to public flags

* use local engine parameter for flutter pub get

* change flutter executable used for flutter drive command

* fix a cleanup issue. address comments. add toolException. enable web in flutter

* address reviwer comments. fix issue with local-engine

* address reviwer comments. fix issue with local-engine

* using engine/flutter/.dart_tools as clone directory. enabling clone script for local usage

* clean flutter repo with felt clean. add a flag to skip cloning the repo. always clone the repo even for local development, unless this flag is set

* fixing typos. updating readme for the new flag.

* fix directory error

* addressing reviewer comments

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