https://blog.wongcw.com/2018/10/25/android-pie%e9%9a%90%e8%97%8f%e6%b6%82%e9%b8%a6app%e5%bd%a9%e8%9b%8b%e6%9b%9d%e5%85%89-%e4%bb%85%e9%99%90pixel-3-pixel-3-xl/
Android Pie隐藏涂鸦App彩蛋曝光 仅限Pixel 3/Pixel 3 XL