Secure your Android even if lost, offline or confiscated

If your Android device is lost, stolen or confiscated you can try to locate or erase it using Google's "Find my Device" but sometimes the person who has your phone has no intention of returning it or is trying to access it's contents. They usually circumvent Find my Device and then attempt to access your data. Today I'll show you how to keep control of your device even if it's offline.