(Enhancement) Prompts the user to unlock the device before changing DNS settings

[apraile]

Thanks for this software ❤️

Since changing DNS settings is important from a security perspective, it would be a good idea to prompts the user to unlock the device before making any changes when the device is locked.

There are several methods from android.service.quicksettings.TileService that can help:

• isLocked()
• unlockAndRun(Runnable runnable)

Thanks.

[Qixot09]

So, should I need to close the internet service before changing dns? Thanks for your suggestions.