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AccessibilityBridge installs various listeners for Android events that invoke Flutter engine APIs. These listeners are removed in AccessibilityBridge.release. However, in some environments there may be deferred calls to the listener that will still execute even after the listener has been removed. This change sets a flag during release and ignores any listener invocations that happen after the flag is set. See https://github.com/flutter/flutter/issues/63555 and https://github.com/flutter/engine/pull/17311
Flutter Engine
Flutter is Google's mobile app SDK for crafting high-quality native interfaces in record time. Flutter works with existing code, is used by developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting Flutter applications. It implements Flutter's core libraries, including animation and graphics, file and network I/O, accessibility support, plugin architecture, and a Dart runtime and compile toolchain. Most developers will interact with Flutter via the Flutter Framework, which provides a modern, reactive framework, and a rich set of platform, layout and foundation widgets.
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