dbus: Listen to visibility requests

Added object: /sm/puri/OSK0 sm.puri.OSK0
with the requests SetVisible(bool) -> (), GetVisible() -> (bool),
and a notifying property Visible:bool
1 job for dbus_pop in 1 minute and 5 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Build
passed build-native #3035
librem5

00:01:05