add Connection property HasImmortalHandles=True

Signed-off-by: Maksim Melnikau <maxposedon@gmail.com>
add ConnectionInterfaceContactList dbus properties

Signed-off-by: Maksim Melnikau <maxposedon@gmail.com>
add ConnectionInterfaceContacts dbus properties

Signed-off-by: Maksim Melnikau <maxposedon@gmail.com>