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

Rather than scrolling the entire contents of the dialog, we should instead
scroll only the part between the title and the button bar.

Also, polish up the padding in the simple dialog demo.

Fixes #6057

The code previously assumed that paint would be called before hitTest, but that
assumption isn't valid because RenderOpacity hit tests its children without
painting them.

Fixes #6089

* fix devices test; print on test failure

* mock out a call to Doctor

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.

As of Xcode 7, Apple recommends setting the bundle identifier in the
PRODUCT_BUNDLE_IDENTIFIER build variable and setting CFBundleIdentifier
to that variable in Info.plist.

As of Xcode 8, CLANG_WARN_INFINITE_RECURSION and CLANG_WARN_SUSPICIOUS_MOVE
are recommended settings.

As of Xcode 7, Apple recommends setting CFBundleIdentifier to
$(PRODUCT_BUNDLE_IDENTIFIER).

The spec forbids persistent bottom sheets from overlapping the app bar. There
are also some fancy scroll-linked effects that we're supposed to do with
persistent bottom sheets, but those will need to wait for another patch.

Fixes #5143

The former horitzontal alignment in the expansion panels demo in
the Gallery was center instead of left. Fixes #6049.

* Adding reference to Flutter-website Text Input guide in API docs for Input

* Grammar

* PR fixes

* fix an encoding issue with calling adb shell getprop

* move code in catch block

* add a test

* switch to LATIN1 encoding

Previously, we were getting double padding: both inside and outside the button.
This patch moves all the padding inside the button so that the whole region is
hittable and the text is positioned correctly.

Fixes #6059

This requires all AnimationController objects to be given a
TickerProvider, a class that can create the Ticker.

It also provides some nice mixins for people who want to have their
State provide a TickerProvider. And a schedulerTickerProvider for those
cases where you just want to see your battery burn.

Also, we now enforce destruction order for elements.

Fixes https://github.com/flutter/flutter/issues/6011

This silences an assertion that fired when reparenting a widget with a
global key inside a LayoutBuilder callback when that callback also
happened to call setState (directly or indirectly) on that widget.

Normally such setStates are considered ok since we know we haven't
cleaned that subtree yet, but we were not correctly handling the case
where the list needed resorting in that situation.

Closes https://github.com/flutter/flutter/issues/6037

This widget lets you apply an ImageFit to a child widget.

Fixes #5830

The debugging logic was lagging behind the recent actual logic changes,
especially around buildScope.

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.

* For reals allow Gallery to be installed by Nexus 5, 5X

* fix for long line

Added a demo of BottomNavigation to the Gallery.

Switch our pubspec.yamls to using SDK sources so that we can have consistent
source types when we depend on these packages from external packages using SDK
sources.