I found a solution.
There is a free contacts editor app at googles playstore, which provides separate fields for street, city etc.
https://play.google.com/store/apps/details?id=org.dmfs.android.contacts
https://dmfs.org/editor/?getit
It integrates itself into the aosp contacts app only for editing of contacts.
I downloaded the apk from playstore with the webdownloader at evozi.com