RecyclerView 添加 Header,
RecycleView 设置 LayoutManager 为 GridLayoutManger的 时候；
Header 要占用3行

         val manager = GridLayoutManager(activity, 3)
        binding.sleepList.layoutManager = manager

        // span size for each position, and assign it to manager.spanSizeLookup.
        manager.spanSizeLookup = object : GridLayoutManager.SpanSizeLookup() {
            override fun getSpanSize(position: Int) =  when (position) {
                0 -> 3
                else -> 1
            }
        }