gatt_client_set_required_security_level() function

The Bluetooth specification makes the GATT Server responsible to check for security. This allows an attacker to spoof an existing device with a GATT Servers, but skip the authentication part. If your application is exchanging sensitive data with a remote device, you would need to manually check the security level before sending/receive such data. With level > 0, the GATT Client triggers authentication for all GATT Requests and defers any exchange until the required security level is established. gatt_client_request_can_write_without_response_event does not trigger authentication gatt_client_request_to_write_without_response does not trigger authentication @pram level, default LEVEL_0 (no encryption required)