Wifi关闭状态下获取Wifi列表

文件修改路径：frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiSettingsStore.java

     private boolean getPersistedScanAlwaysAvailable() {
//        return Settings.Global.getInt(mContext.getContentResolver(),
//                Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE,
//                0) == 1;
        return true;
     }