系統定制，裁剪Wifi，bt等模塊

UI部分可參考： SystemUI 隱藏下拉快捷面板部分模塊(wifi,bt,nfc等)入口

Android系統啟動后Zygote進程會forkSystemServer進程。SystemServer啟動Andorid服務.

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