title: bt_adapter_le_start_scan() scans other than BLE devices too in tizen wearable native application
body: <p>I am developing tizen wearable native application, in which I only needs specific BLE devices to be scanned.
  So, I am scanning BLE devices with the help of bt_adapter_le_start_scan(). But this method returns both BLE and other 
  Bluetooth devices too. I don't want other than BLE devices to be scanned, because if I have more bluetooth devices near me
  it is taking lots of time to scan that BLE devices. As name suggest bt_adapter_le_start_scan() should only look for BLE devices.
  I can filter out these BLE devices but it is taking lots of time to scan that specific BLE devices.</p>
  
  <p>So, how can I restrict bt_adapter_le_start_scan() to only scan for BLE devices?
  or is there any way to send UUID(Bluetooth device identifier) to scan function which will only scan for specified devices 
  in quickest way?</p>