Ensure that flutter doctor returns a partial installation status when
ideviceid is not installed.

This broke Fuchsia as they haven't updated to Dart 1.24 yet :(

Our emulator detection was based on a simple heuristic that was
failing for the Samsung Galaxy S8. Any heuristic is flawed since
Android devices can report whatever they want to adb, but this
change attempts to tighten the detection by listing known models
(by their ro.hardware property). Again, these values could be
spoofed by emulator system images, but it's less likely to be
an issue than with our previous (and fall-back) heuristic.

Fixes #10203
Related: #10248

This helps to debug encoding issues that are believed to only happen for certain locales (see https://github.com/flutter/flutter/issues/10198 fo example).

DO NOT SUBMIT until Dart SDK has been bumped (https://github.com/flutter/flutter/pull/10110) as this depends on new API.

* Remove '\n' from terminal input.

* Use trim instead of replaceAll

* Add unit test

* Cleanup the test

* Fixed lint

* Style adjustments

* Forgotten @override

* Revert "Forgotten @override"

Accidently added extra files.

This reverts commit 0aba24fc8ea321b3a4d0cd8aed7f589378393d96.

* Just @override change

* first pass

* improvements

* extract terminal.dart

* rebase

* add default terminal to context

* The analyzer wants the ../ imports in front of the ./ imports

* review notes

Rather than complain about these in a code review I figured I'd just fix them. :-)

For some reaosn, when we discovered our URI, we were re-instantiating
the `Completer` instance variable whose future we listen to in `nextUri()`.
This led to a race between a caller calling `nextUri()` and us discovering
the URI. If we happened to discover our URI before a caller called
`nextUri()`, then they would be left waiting on a future from the newly
allocated `Completer` (which would never complete).

Fixes #10064

* blind wrote everything except the user prompt

* works

* Add some logical refinements

* Make certificates unique and add more instructinos

* print more info

* Add test

* use string is empty

* review notes

* some formatting around commands

* add a newline

This way, you can test things even with a VerboseLogger.

Fixes https://github.com/flutter/flutter/issues/9954

Fixes https://github.com/flutter/flutter/issues/9929

Fixes #9866

Add a flutter doctor --android-licenses command that locates and runs the Android SDK license manager (#9892)

See https://github.com/flutter/flutter/issues/8438

* Enforce valid package names on flutter create

Fixes #9564

* refactor

* fix other tests

Spawned from a discussion in https://github.com/flutter/flutter-intellij/pull/1003

* record doctor failures

* fully mock out analytics dependencies

* handle errors

* review notes

* Don't crash on `flutter create .`

Fixes #9828

* review comments

Builds on engine fixes to #9813

Also fixes #7366

Eagerly generate local.properties, and always update the flutter.sdk
setting in it, in case FLUTTER_ROOT has changed.

Fixes #8365.
Fixes #9716 - at least the specific issue reported. My Android Studio
still complains about Gradle versions - it ships with v3.2, but requires
v3.3...

Add a 'generate dependencies' task to the Gradle build, which checks if
the snapshot dependencies file exists, and runs an extra build before
the actual FlutterTask if it doesn't. This makes the first build slower,
but sub-sequent builds (without source changes) much faster.

Fixes #9717.

* Remove all initial cocoapod traces from flutter create except Podfile

* Make updateXcodeGeneratedProperties parameters named

* review notes

This message will be picked up by IntelliJ and shown to the user in a toast.

This reverts commit 9f5fa31e.