Allow using custom tile server via HTTP

[texaskst]

Online maps prevent Meshtastic app to be used with no internet connection. The recent app version allows adding custom tile servers. So in order to make it autonomous you can spin up a local tile server on your Android device and point the Meshtastic app to fetch tiles from localhost.
Problem with this approach is that the map component only allows HTTPS schema to be used. And making your local tile server working with HTTP is not a trivial task, mainly due to the self signed certificates.
This PR adds network configuration that will allow the app to use HTTP for localhost only.
With this you can spin up a tiny tile server and use it as a map tile source without any internet connection

[CLAassistant]

All committers have signed the CLA.

[jamesarich]

Interesting method to accomplish offline maps - nice.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.57%. Comparing base (298d469) to head (6243722).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3976   +/-   ##
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  Coverage   0.57%   0.57%           
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  Files        401     401           
  Lines      23852   23852           
  Branches    3060    3060           
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  Hits         136     136           
  Misses     23695   23695           
  Partials      21      21           

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