Required for compatibility with older versions of Android

Fixes #4261

Ensure that any new/changed doctor checks are evaluated and reported
post upgrade.

Previously it implied that you had to always say lib/main.dart in the "flutter run" command.

* make flutter create less chatty

* output generated file count; mention lib/main.dart

The diagnostic port forward can be arbitrarily assigned and typically
is not the default

Fixes https://github.com/flutter/flutter/issues/5867

* make app ids more unique

* in-line the uuid class

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

The way this was implemented is sketchy, especially in strong mode.

* show hidden flags when showing verbose help
* flutter -v show verbose help

This rewrites imports of various mojom.dart files from the Flutter
engine repo to instead import normal-looking dart files from the
(new) flutter_services package. This package handles exporting the
correct symbols from generated code wherever that may live.

Includes an engine roll to 3551e7a48e2e336777b15c7637af92fd7605b6c5
which contains the new flutter_services package.

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

* Update tools to use `analyzer` from vended Dart SDK.

* updates `flutter_tools` and `flutter_test` to use the SDK-vended `analyzer` package
* tweaks dependency tracking logic to only record the SDK-vended `analyzer` so as not to crash on spurious conflicts (due to transitive dependencies)

* Review fixes.

* refactor _run to runCmd

* replace requiresProjectRoot getter with call to commandValidator

* replace requiresDevice getter with call to findTargetDevice

* trace command requires a debug connection, not a device

* inline androidOnly getter

* rename command methods to verifyTheRunCmd and runCmd

* move common verification into BuildSubCommand

* rename deviceForCommand to device

* rename methods to verifyThenRunCommand and runCommand

This moves all of the various .analysis_options* files to the flutter repo root so that it's easier to
* remember to keep them all in sync, and
* easily refer customers to them

part of https://github.com/flutter/flutter/issues/5789

* Build unlinked summaries for packages on upgrade.

* Iterate through the packages in folders.

* Rollback the debug change.

To avoid orphaning people on the deprecated alpha branch, this patch teaches
`flutter upgrade` to switch to the master branch.

... in place of manual process wrangling.

Fixes flutter drive breakage introduced in d2fda677.

When flutter run is used on a Mac and no devices are specified or attached, suggest launching a simulator first. Fixes https://github.com/flutter/flutter/issues/5674

This updates the flutter analyze command to use the .analysis_options_flutter_analyze in the repo root when either the --flutter-repo flag is supplied or the sources being analyzed reside in the flutter repo.

* show device list in flutter doctor output
fixes https://github.com/flutter/flutter/issues/5625

* improve device matching error message
fixes https://github.com/flutter/flutter/issues/5675

Implement flutter format, fixes https://github.com/flutter/flutter/issues/5338