[Feature Request] NL Tester app to show all provider results

It would a lot easier to know if provider works at all if we can see result from each provider, including TTFF (Time To First Fix)

maybe one can start from by forking existing open source app like [Android GPS Testing Tool](https://github.com/Esri/android-gps-test-tool/)
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Start by reviewing the proposed Android GPS Testing Tool and UnifiedNlp's plugin interface to understand how provider results could be collected. Done means an NL Tester app can show results from each provider and report TTFF, but the issue does not identify implementation files or tests.

Written by the indexing model from the issue text.