Allow multiple families/groups for location sharing

[Nxtmaster10]

When using the location sharing, I don't just want one family but I want to be able to have multiple groups that can share their location with each other.

Use case:
If a user has multiple friend groups a person from group A might not want to share the location with a person from group B but both groups have a common person C (i.e. the person hosting dawarich) they want to share their location with.

If this is wanted I am willing to develop this feature.