Doesn't work well in 2G/3G

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Hello,

I don't know if it's [UnifiedNlp](https://github.com/microg/android_packages_apps_UnifiedNlp/issues/105) or IchnaeaNlpBackend that doesn't work well but often my map apps can't find my location. I meant that doesn't work well with GPS disabled (disabled or in buildings). With GPS the location is found quickly. When GPS is not available UnifiedNLP should locate me, not accurately but I think in a range of 100m to 1km based on wifi and gsm, and that often not the case.

- Sometimes the location is never found
- Sometimes the location is quite imprecise (200+ km radius)
- Sometimes the location is wrong, not updated, and correspond to the location where the last time I used the map apps

By the way I live in Bordeaux, France and there is plenty of wifi and 2G, 3G around. The thing is that at a given location sometimes that work, sometimes not.

Thanks !

Start by reproducing the location failures with GPS disabled in Bordeaux, comparing cases where Wi-Fi and 2G/3G provide no, stale, or very imprecise location. Trace the IchnaeaNlpBackend location flow through UnifiedNlp and Mozilla Location Service; done means non-GPS location is reliably returned, updated, and within the expected accuracy range.

Written by the indexing model from the issue text.