settings: Translate languages' names into current selected language

These used to be translated, but then we accidentally stopped in
a483f56 about a year ago. Oops; fix.

src/settings/SettingsScreen.js

@@ -135,7 +135,7 @@ export default function SettingsScreen(props: Props): Node {
         items={languages.map(l => ({
           key: l.tag,
           title: noTranslation(l.selfname),
-          subtitle: noTranslation(l.name),
+          subtitle: l.name,
         }))}
         onValueChange={value => {
           dispatch(setGlobalSettings({ language: value }));