GAP_ConnBTRead() function

* Function GAP_ConnBTRead * Description Bluetooth aware applications will call this function after receiving * GAP_EVT_RXDATA event. * Parameters: handle - Handle of the connection returned in the Open * pp_buf - pointer to address of buffer with data, * Returns BT_PASS - data read * GAP_ERR_BAD_HANDLE - invalid handle * GAP_NO_DATA_AVAIL - no data available