Yes, using the withStringsXml config plugin would be better. I’m not sure exactly how to use it, though. Perhaps one of the Expo team members could give us an example. @notbrent?
EDIT: Here’s an example of how to write something similar to the above.
Something based on the Android localization docs (probably together with a config plugin) would probably be even better.
Otherwise, you’ll need to wait until they can fix this issue in the expo prebuild code.