bt-api: Do not log the _bt_check_privilege() using macro

bt-api: Do not log the _bt_check_privilege() using macro

Here we are replacing the _bt_send_request() macro with the
direct function call inorder to not print the _bt_check_privilege()
method call. This helps us in reducing the prints and also if there
is any error the caller is always printing the details.

-       result = _bt_send_request(service_type, service_function,
+       result = _bt_sync_send_request(service_type, service_function

Change-Id: Ibe5b1d3acb4eff978b93ff4fdecb4ad2806b330a
Signed-off-by: Syam Sidhardhan <s.syam@samsung.com>