BTA_DmAddBleKey() function

* Function BTA_DmAddBleKey * Description Add/modify LE device information. This function will be * normally called during host startup to restore all required * information stored in the NVRAM. * Parameters: bd_addr - BD address of the peer * p_le_key - LE key values. * key_type - LE SMP key type. * Returns BTA_SUCCESS if successful * BTA_FAIL if operation failed.