CM11 Themes: Allow forcing idmap (re)creation.

    private static final long PACKAGE_HASH_EXPIRATION = 3*60*1000; // 3 minutes

    /**

     * IDMAP hash version code used to alter the resulting hash and force recreating

     * of the idmap.  This value should be changed whenever there is a need to force

     * an update to all idmaps.

     */

    private static final byte IDMAP_HASH_VERSION = 1;

    final HandlerThread mHandlerThread = new HandlerThread("PackageManager",

            Process.THREAD_PRIORITY_BACKGROUND);

    final PackageHandler mHandler;

        byte[] md5 = getFileMd5Sum(pkg.mPath);

        if (md5 == null) return 0;

        p = new Pair(Arrays.hashCode(md5), System.currentTimeMillis());

        p = new Pair(Arrays.hashCode(ByteBuffer.wrap(md5).put(IDMAP_HASH_VERSION).array()),

                System.currentTimeMillis());

        mPackageHashes.put(pkg.packageName, p);

        return p.first;

    }