Get device language

[SrMouraSilva]

The current implementation uses the language navigator, not the smart device language

https://github.com/PedalPi/Apk/blob/master/src/providers/lang/language.ts#L22-L25

Uses device language
https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-globalization/index.html

Obs:
https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-globalization/index.html#android-quirks