RootLayout.java

public class RootLayout extends android.widget.FrameLayout {
  
	@Nullable
	private WindowInsetsCompat windowInsets;

	public RootLayout(Context context) {
		this(context, null);
	}

	public RootLayout(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public RootLayout(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
			ViewCompat.setOnApplyWindowInsetsListener(this, (view, insets) -> {
				windowInsets = new WindowInsetsCompat(insets);
				return ViewCompat.onApplyWindowInsets(view, insets);
			});
	}

	@Override
	public void addView(@NonNull View child, int index, ViewGroup.LayoutParams params) {
		super.addView(child, index, params);
		if (windowInsets != null) {
			ViewCompat.dispatchApplyWindowInsets(child, windowInsets);
		}
	}
}