Fixes #3835

* add google analytics

* send in the run target type

* track device type targets

* use the real GA code

* review comments

* rev to usage 2.0

* rev to 2.2.0 of usage; add tests

* review comments

* allow flutter create to re-gen over an existing project

* add a regression test

* Add validity checks to create

* Adjust indent

This command explicitly populates the flutter tool's cache of binary artifacts.
Also, teach `flutter create` to update the cache in case its the first command
that a user runs.

"flutter create" adds option `--with-driver-test` that adds
dependencies to `flutter_driver` in `pubspec.yaml` and creates
a basic driver test runnable via `flutter drive
--target=test_driver/e2e.dart`

"flutter drive" new options:

- `--keep-app-running` tells the driver to not stop the app after tests
  are done
- `--use-existing-app` tells the driver to not start a new app but use
  an already running instance

Fixes #2011

This removes a step that can cause trouble.

Fixes #1904

These are required to upload to the store.

Fixes #1006

rename to printTrace(), printStatus(), and printError()

remove device type specific checks