* refactor device descriptions method - easier to add columns
* show device SDK version

It takes a little bit longer that 10 seconds to install, launch and
have the observatory be available on an iPod touch. Depending on the
size of the application, it could be a lot longer to transer the
bundle over the wire. The 60 seconds is arbitrary.

Fixes #6283

This patch adds `@checked` everywhere is needed to remove the
`strong_mode_invalid_method_override` strong mode error.

When using --use-application-binary:

- [x] Stop flutter run from checking for a pubspec.yaml in current directory
- [x] Stop flutter run from invoking pub get
- [x] Set 'shouldBuild' based on --use-application-binary
- [x] Stop requiring 'lib/main.dart' to be present before running.
- [x] Stop building an FLX when launching on Android

Ensure that we're monitoring logs before we launch the app on the
device. This prevents the case where we start monitoring after the ports
have already been logged.

Also update the regex to use an optional capture group.

With iOS 10, the syslog format changed from:
Sep 23 16:04:17 cbracken-iPhone Runner[6188] <Info>: .*

to:
Sep 23 16:04:17 cbracken-iPhone Runner(libsystem_asl.dylib)[6188] <Info>: .*

This updates the observatory port scraping to handle either case.

Fixes https://github.com/flutter/flutter/issues/5775

`Process.start` seems to be escaping as needed.

* send the reload source command for ios simulators

* review changes

* rewrite w/ a completer

As of `1.18.0-dev-0`, these cases will get flagged.  In the meantime, the

Enable launching applications on the iOS device with observatory and diagnostics server connected. (#4424)

* send supportsRestart flag when starting an app

* remove unused imports

* review comments

Fixes #4298

* show build progress; print app sizes

* add todo

* review comments

* remove unused import

* working on making a faster flutter run restart

* clean up todos; fire events on isolate changes

* use the Flutter.FrameworkInitialization event

* review comments

* iOS tools cleanup

1) Fix `flutter install` on both device and simulator to refer to the actual
   bundle and not just the .generated folder
2) Fix `flutter run` on device to actually run vs just installing

Still TODO:
1) Discovered that isAppInstalled on iOS simulator always reports true,
   meaning it'll never actually try to install the app.

Fixes #3947
Fixes #1823

Wire up ios-profile and ios-release. Switching between debug, profile and release starts the build process from scratch. (#4063)

Artifacts from local engine builds will be found based on the --local-engine flag

Host tools can be found in the artifact cache directory for the host platform.
If a developer wants to use a local engine build instead, then provide an
--engine-build flag that selects the specific engine build variant.

* fix analysis errors

* review comments; fix test

* re-add an export for debugPrint

* rework flutter run

* fix npe with --debug-port

* connect to obs and exit when that conneciton closes

* update todos

Add a command that can capture a Skia picture of a Flutter frame and send it to a file or skiaserve debugger (#3165)

All artifacts for iOS are universal.