The whitelist is a list of well-known D-Bus names, which we then search
for the unique name we get from the method invocation - unsuccesfully.
Fix this by watching the bus for any name in the whitelist in order
to maintain a map from wel-known to unique name that we can use for
matching.
https://gitlab.gnome.org/GNOME/gnome-shell/issues/1916
(cherry picked from commit eee1ab48903b83cef18cd85131436c0e1f987513)
334762ee9e