Fix typo that leads to attention not working

package com.android.server.power;

import static android.provider.DeviceConfig.NAMESPACE_ATTENTION_MANAGER_SERVICE;

import static android.provider.Settings.Secure.ADAPTIVE_SLEEP;

import android.Manifest;

import android.app.ActivityManager;

     * DeviceConfig flag name, describes the limit of how long the device can remain unlocked due to

     * attention checking.

     */

    static final String KEY_MAX_EXTENSION_MILLIS = "post_dim_check_duration_millis";

    static final String KEY_MAX_EXTENSION_MILLIS = "max_extension_millis";

    private Context mContext;