ndef: Implement static handover

ndef: Implement static handover

static handover is going through a different D-Bus path as it would not
make sense to handle both static and dynamic handover from the same code
path.
Static handover means an application explicitely requires to send a
handover select without having previously received a handover request.
This could typically be used for handling WiFi handover through
configuration token from the registrar perspective. The registrar
(a.k.a. the Access Point) would send a configuration token via Handover
and expects the Enrolle (a.k.a. the WiFi STA) to initiate the WiFi
association.