Failing to get correct content rect on Android

[NiklasEi]

I am working on an Android app using Bevy and am having trouble getting the are of the screen that I can render my app in. My phone has a camera cutout on top and soft buttons in the bottom area of the screen.

The area of the soft buttons is correctly given by (inner_size.height as f32 - content_rect.bottom as f32) / scale_factor as f32, but the top area is consistently reported as too big. One way to see this is to remove the WindowManagerFlags::LAYOUT_IN_SCREEN flag, which completely removes the possibility to render behind the camera/info bar. But content_rect still tells me I need to keep 56px on top empty (content Rect { left: 0, top: 147, right: 1080, bottom: 2047 } and scale 2.625). An even bigger distance from top gets reported when I change from portrait to landscape mode.

The following shows two buttons rendered according to the reported content rect at the top most and bottom most positions (I am ignoring left/right for now).

Screen_Recording_20230708-125921.mp4

[mockersf]

related to #2308

[NiklasEi]

Also seems similar to rust-mobile/android-activity#43

But here it can't just be the size of the titlebar that's forgotten to be taken into account. There is none.