Restrict bluetooth tethering with user restrictions.

import android.os.Message;

import android.os.RemoteException;

import android.os.ServiceManager;

import android.os.UserManager;

import android.provider.Settings;

import android.util.Log;

import com.android.bluetooth.btservice.ProfileService;

import com.android.bluetooth.Utils;

import java.net.InetAddress;

import java.util.ArrayList;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

    void setBluetoothTethering(boolean value) {

        if(DBG) Log.d(TAG, "setBluetoothTethering: " + value +", mTetherOn: " + mTetherOn);

        enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH_ADMIN permission");

        UserManager um = (UserManager) getSystemService(Context.USER_SERVICE);

        if (um.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) {

            throw new SecurityException("DISALLOW_CONFIG_TETHERING is enabled for this user.");

        }

        if(mTetherOn != value) {

            SharedPreferences tetherSetting = getSharedPreferences(PAN_PREFERENCE_FILE, 0);