Use getFlashLockState API to check lock state

import android.os.StrictMode;

import android.os.SystemProperties;

import android.os.UserHandle;

import android.service.persistentdata.PersistentDataBlockManager;

import android.os.UserManager;

import android.os.storage.IMountService;

import android.provider.SearchIndexableResource;

    private DevicePolicyManager mDpm;

    private UserManager mUm;

    private WifiManager mWifiManager;

    private PersistentDataBlockManager mOemUnlockManager;

    private SwitchBar mSwitchBar;

    private boolean mLastEnabledState;

                ServiceManager.getService(Context.BACKUP_SERVICE));

        mWebViewUpdateService  =

            IWebViewUpdateService.Stub.asInterface(ServiceManager.getService("webviewupdate"));

        mOemUnlockManager = (PersistentDataBlockManager)getActivity()

                .getSystemService(Context.PERSISTENT_DATA_BLOCK_SERVICE);

        mDpm = (DevicePolicyManager)getActivity().getSystemService(Context.DEVICE_POLICY_SERVICE);

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

        return !SystemProperties.get(PERSISTENT_DATA_BLOCK_PROP).equals("");

    }

    private static boolean enableOemUnlockPreference() {

        String flashLocked = SystemProperties.get(FLASH_LOCKED_PROP);

        return !"0".equals(flashLocked);

    private boolean enableOemUnlockPreference() {

        int flashLockState = PersistentDataBlockManager.FLASH_LOCK_UNKNOWN;

        if (mOemUnlockManager != null) {

            flashLockState = mOemUnlockManager.getFlashLockState();

        }

        return flashLockState == PersistentDataBlockManager.FLASH_LOCK_LOCKED;

    }

    private void updateOemUnlockOptions() {