RenderAndroidView is responsible for sizing and displaying an embedded
Android view.
AndroidView is responsible for creating and disposing the Android view
and is using RenderAndroidView to display it.

* Changed duration

* Fixed column width for ios build error messages

* fixed a couple things

* fixed a couple things

* accidental changes

* added spaces

* added spaces

* Added test for default snackbar duration

* Fixed link:

* Final commit

* Final commit2

* Actual final commit

* Remove uses of deprecated constants
* Change int.parse to int.tryParse where appropriate

The verbosity change is to help track down timeouts that currently look like:

```
C:\Windows\Temp\flutter sdk>call bin\flutter.bat config --no-analytics
Checking Dart SDK version...
Downloading Dart SDK from Flutter engine c5a63d28bf3735569c8187753bc490d8351a8363...
Unzipping Dart SDK...
Updating flutter tool...
```

Follow-up to https://github.com/flutter/flutter/pull/18562, which passed Travis before the check was added.

Checks only changed source files (C++, Dart, Java, ObjC) for trailing whitespace.

With a fix of a path being printed relative instead of absolute.

482469bad Roll Dart to 937ee2e8ca4b76499e24cd463f07bfb736bccd74. (#5800)
bb323c145 Revert "Roll src/third_party/skia 9e0d7e4072e4..297c3c8e85bd (62 commits) (#5802)" (#5803)
0bf69f02d Roll src/third_party/skia 9e0d7e4072e4..297c3c8e85bd (62 commits) (#5802)

5d0e13a45 Fix starting isolate directly from CoreJIT snapshot. (#5798)

09ff9493e Re-land removal of vmservice_io from release builds. (#5784)
b523ee847 Revert "Switch to Fuchsia's ICU (#5774)" (#5801)
69695493b Switch to Fuchsia's ICU (#5774)

55b423f07 Ensure assistiveTechnologyEnabled is initialized when the android view is set up (#5793)
3054f3183 Add touch events to the platform views method channel API. (#5796)
91c16af0c Revert "Roll Dart to 937ee2e8ca4b76499e24cd463f07bfb736bccd74. (#5745)" (#5799)
1a66f895b Roll Dart to 937ee2e8ca4b76499e24cd463f07bfb736bccd74. (#5745)
8d046a727 Revert "Roll src/third_party/skia 9e0d7e4072e4..8f8bf8880d9d (32 commits) (#5794)" (#5797)
e8d172cf3 Revert "Fix Dart 2 reload when running from a snapshot instead of platform.dill. (#5792)" (#5795)
624cf7e25 Fix Dart 2 reload when running from a snapshot instead of platform.dill. (#5792)
16da4710d Roll src/third_party/skia 9e0d7e4072e4..8f8bf8880d9d (32 commits) (#5794)
3fe63fd5d Add presubmit check for engine to flutter roll (#5790)

Added textInputAction parameter to TextFormField that forwards to TextField, added onEditingComplete parameter to TextField that forwards to EditableText, added onEditingComplete parameter to TextFormField that forwards to TextField. (#19397) (#19427)

Fixes https://github.com/flutter/flutter/issues/18971

Generated.xcconfig is only required at build time for iOS apps. In the
flutter create project template and example apps, Generated.xcconfig was
previously marked as a resource to be bundled into the built app.

While working on attach, I changed the message output while waiting for an app to connect but didn't catch this.

* Extract some of startApp into a reusable method

* Get basic attach --machine working

* Attach --machine tweaks

Move validation to validate method and create daemon early so we get the startup event before trying to get a connection.

* Bump daemon version so we know whether it's valid to flutter attach

* Tweak output text

* Swap package imports for relative

* Review tweaks (naming, formatting, typedefs)

* Separate arguments from process spawning

This will make calling attach easier

* Add a basic test for flutter attach --machine

* Fix crash if port unforward modifies the list of forwarded ports

* Add a no-op port forwarder for flutter-tester

* Switch to using BasicProject instead of our own inline code

* Fix expectation in test now we have a portForwarder

* Remove stale TODO (this is done)

* Tweak formatting

* Change some Completers to void to fix Dart 2 issues

* Make cleanup of flutter processes in tests more reliable

* Fix quit signals

I confused SigInt&SigTerm for SigTerm&SigKill when I first did this. SigTerm can be blocked and doesn't guarantee the process will be terminated.

* Don't use deprecated constants

* Fix typo

* Add some additional info to debug buffer

* Fix return types on Futures

* Only printError on our simple messages

Any other type is a real error that should be a normal crash (to get a proper error log).

See #19453.

* Add toList() to convert Iterable<String> -> List<String>

This code previously throw in Dart-2 mode.

Fixes #19453.

* Move getSimulatorPath into Xcode

* Add a test that we tried to launch the simulator

* Remove unused import

* Add sample of multicolumn picker to Flutter Gallery
* Modify CupertinoPicker to be able to be rendered off-center.

Flutter app development has been Dart 2 only for a significant amount of
time, and we're about to remove all support for Dart 1.

Currently only Android views are supported.

This also includes a FakePlatformViewsController which is a fake
implementation of the engine side for testing.