https://www.developer-tech.com/news/2018/jul/31/google-android-p-guidelines-notch-devices/

Android P is nearing release and so Google has set out its guidelines for how the ‘notch’ found on many new devices should be accommodated.

Love it or hate it, the notch has become mainstream. First marketed by the first ‘Essential’ smartphone and quickly followed by other Android manufacturers to maximise the screen-to-device ratio, even Apple has adopted it with the iPhone X.