Android app: Allow translation of fastlane metadata

[StoyanDimitrov]

Sample configuration. Keep in mind that there are issues with some language codes.

[binwiederhier]

As requested https://hosted.weblate.org/projects/ntfy/android-fastlane/

It's only 3 strings though. Not sure why the changelogs don't show up. But the changelogs would be pretty tedious anyway I think.