Implement bluetooth API based on Tizen bluetooth stack

BUG=XWALK-1065

Signed-off-by: Corentin Lecouvey <corentin.lecouvey@open.eurogiciel.org>
But the bt_initialize call was there already for the BlueZ 4/5 backends. Now that is gone and only behind TIZEN_CAPI_BT define. I would assume the BleuZ 4/5 backends need that call also and are now broken.