vndservicemanager requires vndservice

Now that vndservice is also not installed by default, if someone has
explicitly requested vndservicemanager to be installed, we also want to
install vndservice, so that it can be used on that device.

Fixes: 165043609
Test: 'm vndservicemanager' also installs vndservice
Change-Id: I115eb2dc15e847be3707296dc7b85f9d1841754c