Ensure that the text input keyboard is reloaded if the view keyboardType
changes.

Fixes https://github.com/flutter/flutter/issues/7724

Added:
* UIRequiredDeviceCapabilities=[arm64]
* MinimumOSVersion=8.0

Fixes https://github.com/flutter/flutter/issues/7723

Provide a default status bar tap handler for FlutterAppDelegate.
By default, taps are passed to the key window's rootViewController if
it's a FlutterViewController. Apps with custom app delegates can
customize this behaviour to send the tap to the FlutterViewController(s)
they prefer by overriding touchesBegan:withEvent.

* [iOS] Ensure FlutterMain is called before interacting with the engine in any way.

* Licenses

The PlatformView superclass constructor was posting a task to the UI thread
that adds the view to the shell's global list.  This could result in UI thread
operations seeing PlatformView instances that are not fully constructed and do
not yet have an engine.

This was happening in https://github.com/flutter/flutter/issues/7735

On iOS, when a tap is detected in the status bar, provide a means to
pass that touch event through to one or more FlutterViewControllers to
trigger a scroll to top. In iOS apps, scroll to top should occur under
the following conditions:

1. There is one and only one UIScrollView visible with
   scrollsToTop == YES.
2. The status-bar is in standard height mode, not in double-height mode.
   In double-height mode, the expected behaviour is to trigger a switch
   to the application associated with the double-height status bar.
3. A tap or a drag gesture occurs that is entirely constrained to the
   status bar frame. (We currently only handle the tap scenario).

Unfortunately, AppDelegates only get touchesBegan events for status bar
taps, though get get touchesBegan and touchesEnded events for drags
within the status bar frame. As such, we currently synthesise the
touchesEnded event for taps.

The Dart tests were migrated from the flutter/test/engine suite in the
framework repository

This is intended to match the exit codes returned by the Dart command line tool

All samples and the 'flutter create' command now use a project-specifc
app delegate.

Any projects that still rely on FlutterAppDelegate should create an
empty delegate that subclasses UIResponder<UIApplicationDelegate> and
defines:
  @property (strong, nonatomic) UIWindow *window;

[content_handler] Make RuntimeHolder convey its viewport metrics to the direct input instance. (#3367)

SkTypeface::MakeFromStream takes ownership of the passed SkStreamAsset*

Fixes https://github.com/flutter/flutter/issues/7657

* Roll Dart SDK to ed00447138f95ea4ba612509a244ca8205735372

Make the VM happy with a spurious instruction snapshot.

* Revert "Snapshots: Don't use an empty array where a NULL array is expected. (#3361)"

This reverts commit 275ffdce.

Broke iOS simulator builds; should no longer be necessary after rolling
the Dart SDK to ed00447138f95ea4ba612509a244ca8205735372.

On iOS simulator builds, we were seeing DartLookupSymbolInLibrary return
a pointer to a address of the snapshot data rather than the address of
the snapshot buffer itself. On simulator builds we don't build the
snapshot data into a buffer in app.dylib (kDartVmSnapshotData) but link
it statically into the engine itself.

* Apply iOS status bar padding only to fullscreen views

Previously padding was applied to account for the status bar, whether in
standard or expanded 'in-call' geometry only if the current view was not
a subview of a containing view. This didn't cover the case of root views
embedded in other windows (e.g. dialogs).

We also ensure that the window is fullscreen to account for cases like
small dialogs centred on the screen.

* Do not apply padding if we're a subview in a containing view

Fixes dart-lang/sdk#28504

The script will be finished when the microtask queue has been drained and
Dart_HasLivePorts is returning false for the main isolate