qemu_process: graphics: setup listen types before ports are reserved/allocated
    
    The code that setups listen types may change a listen type from address to
    socket based on configuration from qemu.conf.  This needs to be done before we
    reserve/allocate ports that won't be used.
    
    Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1364843
    
    Signed-off-by: Pavel Hrdina <phrdina@redhat.com>