i dont yet have enough reputation to propose tags in questions. Nevertheless, it seems incongruous that in a GIS site, there is no reference to a leading open source solution, such as OSMDROID.

I hereby humbly request that someone with more reputation consider this my suggestion: include tag "OSMDROID"

I do not yet have enough reputation to propose tags in questions.

Can someone with more reputation create a tag for osmdroid, please?

It is a free, open source Android library that provides Tools / Views to interact with OpenStreetMap-Data. It is an alternative library to Google Maps API.