https://blog.wongcw.com/2019/06/08/android-q-beta-4%e6%88%96%e5%b0%87%e6%99%ba%e8%83%bd%e8%a7%a3%e9%8e%96%e5%8a%9f%e8%83%bd%e9%87%8d%e5%91%bd%e5%90%8d%e7%82%bapixel-presence/