Standalone DocumentsUI file manager

Add a standalone mode to the DocumentsUI
to let it act as a file manager/explorer.

独立DocumentsUI文件管理器

添加DocumentsUI的独立模式,
从而让他像一个普通的文件管理器一样运行.

Thanks to OmniROM for the original implementation.
感谢OmniROM原创实现此功能.
Prevent lock/unlock sound during music playback

Lock/unlock sound mixes in with music and causes
lag and distortion.

在播放音乐时阻止播放锁屏/解锁声音

锁屏/解锁声音和音乐混在一起会造成卡顿和失真.
[1/2] User configurable (un)plug wake/nofitication

Add an user configurable option to enable/disable
* Wake the display when charger power is connected/disconnected.
* Play notification sound when charger power is connected/disconnected.
* Vibrate when charger power is connected/disconnected

[1/2] 用户可配置的(断开)连接唤醒/通知

添加一个用户可配置的选项来启用/禁用
* 充电电源连接/断开时唤醒屏幕.
* 充电电源连接/断开时播放通知声.
* 充电电源连接/断开时震动.

[2/2] in platform_packages_apps_Settings

Thanks to CyanogenMod for the original implementation.
感谢CyanogenMod原创实现此功能.
Add [SystemUI] zh-rCN translation by @silverhoo1124

添加来自 @silverhoo1124 的[SystemUI]部分简体中文翻译