Fixes #988

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

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

The current implementation matches the default behaviour of the material
scaffold.

Fixes https://github.com/flutter/flutter/issues/4478

fixes https://github.com/flutter/flutter/issues/6163

Refined query template with "new" keyword.

DragTarget would call setState after it was disposed in didLeave
and didDrop. Fixes #6128.

Turns out the lowest version allowed here isn't compatible with
flutter_tools' usage of this package.

Now dart:ui does the decoding of the pointer data itself, which means we don't
need to do it in the framework.

* use less granular progress

* update restart text

* fix flutter watch benchmark

Syncs https://github.com/flutter/cocoon/commit/d2d7950ecd2c72421d75d9b5d54805cc554e92a8

* Split Android/iOS impl behind a unified interface

Syncs https://github.com/flutter/cocoon/commit/db87e10fa54317115479d0b85280c7e5eed08ff7

* Switch from pub get to flutter packages get

Syncs https://github.com/flutter/cocoon/commit/b378005cbbc5330058d5240a2970ca477c2c9722

* "silent" option in test runner; fix analysis errors;

This demo doesn't work properly in landscape and is confusing. It's
really more of a test of the material arc code.

Fixes #5710

Fixes #5141

Rather than removing all the padding from an AlertDialog, we now just use
Dialog directly for the date picker.

* make app ids more unique

* in-line the uuid class

To match the Align widget (and several other widgets).

Fixes #6101

For consistency with Tween.

Fixes #5169

libimobiledevice 1.2.0 is incompatible with Xcode >= 8.0. Since the
libimobiledevice tools don't include a --version flag, check for valid
exit code on running idevicename, if an iOS device is connected.

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

* globalToLocal was just broken when there was a rotation and a
  translation at the same time. This fixes that and adds a test.

* update graphic used by spinning_mixed since the old one went 404.

* simplify some of the code in the demo.

* fix MatrixUtils.transformPoint to be consistent with how we transform
  points elsewhere.

* stop transforming points elsewhere, just use
  MatrixUtils.transformPoint.

* make the Widget binding handle not having a root element.

* make the spinning_mixed demo update its widget tree.

This version of the engine crashes on startup.

This reverts commit a426b6b3.

We were trying to cram too much functionality in to the Dialog widget. Now we
have AlertDialog and SimpleDialog to cover to two different kinds of dialogs in
the spec.

Fixes https://github.com/flutter/flutter/issues/6056

This patch fixes the issue in two ways:

1. The content area is now scrollable, which means you can scroll to reveal any
   parts that don't fit on screen.
2. The content area is now small enough to fit on screen in landscape on a
   Nexus 5.

Fixes #6054

Fixes #6053