Represents the area of the screen the window caption bar occupies at the top of the application window.
The caption bar contains the window title and the window controls. It only appears when the application window is displayed in a freeform or desktop windowing environment, and is empty otherwise.
The system controls the visibility of the caption bar, so AndroidWindowInsets.Show and AndroidWindowInsets.Hide have no effect on it. To control whether your application window extends behind the caption bar, use AndroidWindowInsets.SetOverlapping instead.
Unlike the status and navigation bars, the caption bar requires Android 15 (API 35) or later for AndroidWindowInsets.SetAppearance and for a transparent AndroidWindowInsets.SetSystemBarsBackground.