screen capture: fix the dimension pill's position during draggin

                                        Modifier.layout { measurable, _ ->

                                            val pillInnerPlaceable =

                                                measurable.measure(Constraints())

                                            val pillVerticalSpacingPx =

                                                with(density) { pillVerticalSpacingDp.toPx() }

                                            // Center the pill horizontally relative to the region

                                            // box's width, and position it vertically below the

                                            // box.

                                            // box's width.

                                            val pillX =

                                                (currentRect.width - pillInnerPlaceable.width) / 2

                                            // Calculate the Y position of the pill, and restrict it

                                            // to stay within the screen bounds.

                                            val pillY =

                                                currentRect.height +

                                                    with(density) { pillVerticalSpacingDp.toPx() }

                                                (currentRect.height + pillVerticalSpacingPx)

                                                    .coerceAtMost(

                                                        state.screenHeight -

                                                            currentRect.top -

                                                            pillInnerPlaceable.height -

                                                            pillVerticalSpacingPx

                                                    )

                                            layout(

                                                pillInnerPlaceable.width,

                                                pillInnerPlaceable.height,