* Don't call `PlatformViewCreatedCallback`s after `AndroidViewController` is disposed
Before this change it was possible that, if a `AndroidViewController` was disposed before we got the notification that the platform view was created, `PlatformViewCreatedCallback`s where called even after calling `AndroidViewController.dispose`.
Also makes `_PlatformViewLinkState._onPlatformViewCreated` more carful to only call `setState` when mounted.
Closes#84628Closes#96384
* Allow all widgets to remove listeners from controller
* Remove assert
* Add expectations to test
ec289f1eb4