add features & fix bugs for OpenHarmony

[xczaixian]

1、Weex支持一键登录。
2、Weex medialibrary断代接口替换。
3、Weex的BroadCastChannel跨页面通信特性增强。
4、增加virtual-loader插件，list组件实现虚拟列表功能。

bugfix：
1、修复使用gesture-loader方案之后，picker组件内无法滑动问题。
2、修复通用事件gesture-loader方案无法感知组件生命周期问题。
3、修复weex-list的scroll事件，滑动时底部的筛选tab一直闪问题。

Brief Description of the PR

Checklist

• Demo:
• Documentation:

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[xczaixian]

start build