应用: 今日头条
任务: 激活今日头条，进入头条，关注‘健康新闻’
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: CLICK
step_id: 5
action: TYPE
type_text: 健康新闻
step_id: 6
action: CLICK
step_id: 7
action: STOP