provide locations via android mock locations developer API

Thanks for the onderful project! :-)

In android, there is an option in the Developer options to "enable mock locations". It would be wonderful to have this implemented, as a straightforward option for providing the Android system with location data.

(see here for example of using this API for injecting location data).
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The issue names no files or tests. Start by reviewing UnifiedNlp's Android location-provider entry points and the linked Android mock-location API example; determine how developer-option mock locations should receive provider data. Done means Android accepts the supplied location data through the requested mock-location path.

Written by the indexing model from the issue text.