Flickering native view

[FaFre]

When running the example with the latest flutter 3.24 there are some flickering issues, especially when slow scrolling or opening the keyboard.

screen-20240826-101150.mp4

I'm not sure if this bug is related to flutter, or if it is because of the native view.

[XertDev]

To be honest, I hadn't noticed it before. :)

I've managed to reproduce it on my devices, I'll have a look at it in my free time.

[XertDev]

I started to test the use of initExpensiveAndroidView. There no longer seems to be these flickering effects when scrolling, but there is still a problem when expanding the keyboard. I guess this would require an analysis of the resize mechanism in geckoview.