[Feature] Support for PoI

[tobru]

The iOS version of OwnTracks has a feature to store PoIs, see documentation in the OwnTracks Booklet: POI and tags. It would be cool to have this feature in the Android app as well.

[jpmens]

It would be cool to have this feature in the Android app as well.

We are aware, Tobias, but thanks for reminding us; it's on a todo list somewhere. :)

[tobru]

We are aware, Tobias, but thanks for reminding us; it's on a todo list somewhere. :)

Thanks for the ack, appreciated.