finalize bluetooth examples and clean up file

Signed-off-by: Corentin Lecouvey <corentin.lecouvey@open.eurogiciel.org>
do not print invalid reply_id error log when postmessage is not initiated by JS

Signed-off-by: Corentin Lecouvey <corentin.lecouvey@open.eurogiciel.org>
remove few logs

Signed-off-by: Corentin Lecouvey <corentin.lecouvey@open.eurogiciel.org>