Added new setting "Show on the lock screen"

[strump]

Problem:

If you turn on flashligh and lock the screen of mobile phone you'll need to unlock it again to turn the flashlight off.

With new setting enabled steps would be:

1. Open SimpleFlashlight app
2. Turn on the flashlight
3. Turn off the screen
4. Turn on the screen

Actual result: user sees the app instread of a lock screen

Details

Flag is OFF by default

MainActivity applies locked screen flags according to the setting.

Translations copied from organicmaps repo.

Tested on Android 14.0