mtk P版本默认开启指定应用安装外部应用权限

\frameworks\base\services\core\java\com\android\server\AppOpsService.java 添加：

try {
            PackageManager pm = mContext.getPackageManager();
            ApplicationInfo ai = pm.getApplicationInfo("packageName", PackageManager.GET_ACTIVITIES);
            setMode(AppOpsManager.OP_REQUEST_INSTALL_PACKAGES,ai.uid, "packageName",AppOpsManager.MODE_ALLOWED );
        } catch (Exception e) {
            e.printStackTrace();
        }