应用: 抖音
任务: 打开抖音，在搜索框下面，浏览前50条抖音热榜
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: SWIPE
step_id: 3
action: SWIPE
step_id: 4
action: STOP