[feature request] interface with UnifiedNlp directly if available

[khimaros]

on the FDroid release, I believe network location is not available reliably because the Google Location Services bits have been disabled. so even if the user has microG installed along with a few UnifiedNlp backends, network location will not resolve.

see also https://github.com/mendhak/gpslogger/issues/284

[khimaros]

here's a good example of how this can be implemented: https://github.com/mirfatif/MyLocation/blob/master/app/src/main/java/com/mirfatif/mylocation/NlpBackend.java