Enable Private DNS with 1.1.1.1 on Android 9 Pie

Google has introduced a new feature in Android 9 Pie called Private DNS Mode, which simplifies configuring custom secure DNS resolvers on Android devices. This feature supports DNS over TLS (DoT), encrypting DNS queries and preventing them from being tampered with or snooped on by ISPs, mobile carriers, or other parties in the network path between a device and its DNS resolver. To enable this feature, users can go to Settings → Network & internet → Advanced → Private DNS and enter 1dot1dot1dot1.cloudflare-dns.com as the hostname. This new protocol ensures communication between devices and resolvers is encrypted, similar to HTTPS traffic.