set Content View Top Padding
Sets the top padding (in pixels) of the sibling content view that holds overlay views such as the thumbnail grid. After the first call the automatic Java-side adjustments triggered by contextual toolbar lifecycle events are suppressed, so Compose can own this value without racing against native view code.
Typical usage: call from a SideEffect keyed on viewWithOverlappingToolbarShown so the padding stays in sync with the visible toolbar height.