Enforce permission check in BLE scan only mode.

    }

    private boolean needsPrivilegedPermissionForScan(ScanSettings settings) {

        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();

        // BLE scan only mode needs special permission.

        if (adapter.getState() != BluetoothAdapter.STATE_ON) return true;

        // Regular scan, no special permission.

        if (settings == null) {

            return false;

        }

        if (settings == null) return false;

        // Regular scan, no special permission.

        if (settings.getReportDelayMillis() == 0) {

            return false;

        }

        if (settings.getReportDelayMillis() == 0) return false;

        // Batch scan, truncated mode needs permission.

        return settings.getScanResultType() == ScanSettings.SCAN_RESULT_TYPE_ABBREVIATED;

    }