Amir Hardon 199310695f Mirror Android platform views a11y tree in the Flutter a11y tree. (flutter/engine#8237)
This PR mirrors virtual a11y tree of embedded platform views in the Flutter
a11y tree.

Non virtual hierarchies are not currently supported.

Only works on Android versions earlier than Android P as it relies on
reflection access to hidden system APIs which cannot be done starting
Android P.

A11y is not yet working as we also need to delegate a11y events from the
platform view to the FlutterView. This will be done in a following PR to
keep the change size a little saner.
2019-03-21 15:26:44 -07:00
..