Previously it always fell through to a zero-length character range at
the specified position.

Update the package() template to match the new syntax. This change keeps this
package working the same way it does currently (i.e., being included in the
system image). In the future, we'll want to remove this annotation and separate
this package from the system image.

* Make the text selection code more defensive

* format

* Move validation to a method

* Fix math

* rename

This reverts commit 4caa68b8.

* Identify text fields as such to a11y on Android

* Add focus flag

Fixes https://github.com/flutter/flutter/issues/12820

Fixes https://github.com/flutter/flutter/issues/12772

This fixes the Fuchsia build.

On hide keyboard, reset the bottom padding to the safe area inset on
devices running iOS 11 or higher.

This change exposes the view safe area insets (introduced in iOS 11) to
the framework via MediaQuery.of(context).padding. Safe area insets are
the view insets (padding) inside of which content can be relied on to
display without truncation/clipping, as would occur with e.g. the iPhone
X sensor notch.

As this API was added in iOS 11, we place it behind a runtime guard
checking OS level.

Until the runtime support for @avialable lands in the next Fuchsia
buildtools rev, ignore -Wunguarded-availability-new around the safe area
insets check and use an FML runtime check instead.

Refactor querying of supported Vulkan extensions.

* Android SeekBars announce their value

* style

Previously, these binaries were in /system/apps, which is going away. Also,
rename flutter_runner to flutter_jit_runner to match flutter_aot_runner.

Instead, the rasterizer can be accessed via the platform view.

* Fix regression - configure asset bundle

* Fix formatting

This will replace the one in the diagnostic server

* Only post UIAccessibilityLayoutChangedNotification if layout actually changed

* ++

* review comment

This reverts commit a48b5f6d.