系统定制，裁剪Wifi，bt等模块

UI部分可参考： SystemUI 隐藏下拉快捷面板部分模块(wifi,bt,nfc等)入口

Android系统启动后Zygote进程会forkSystemServer进程。SystemServer启动Andorid服务.

frameworks/base/services/java/com/android/server/SystemServer.java

        if (context.getPackageManager().hasSystemFeature(
                PackageManager.FEATURE_WIFI)) {
            // Wifi Service must be started first for wifi-related services.
            if (!isArc) {
                t.traceBegin("StartWifi");
                mSystemServiceManager.startServiceFromJar(
                        WIFI_SERVICE_CLASS, WIFI_APEX_SERVICE_JAR_PATH);
                t.tr