Tileset messages need to be translated from English (around 60)

[BirdSamuel]

Since functionality for Tilesets were added, the strings need to be translated.

This entire section is new:
Starting from -
https://github.com/ROGUE-JCTD/Arbiter-Android/blob/mbtiles/Arbiter-Android/res/values/strings.xml#L124

Also there are a couple extra strings:
https://github.com/ROGUE-JCTD/Arbiter-Android/blob/mbtiles/Arbiter-Android/res/values/strings.xml#L204

Base Layer was also changed to Background Map, and one label for base layer was changed to current, on these lines (282-283):
https://github.com/ROGUE-JCTD/Arbiter-Android/blob/mbtiles/Arbiter-Android/res/values/strings.xml#L282