Amis official example, menu wont appear in android phone

#### 描述问题：
I tested official example: https://baidu.github.io/amis/examples/index in my Android phone ( 6.53 inch , 2340 * 1080 px). Unfortunately menu won't come up even after multiple clicks on button with 3 dashes at the top right corner. Please check.

Another issue with amis-admin.. Menu toggle button is not visible. Please check the attachment.

https://user-images.githubusercontent.com/37118923/153739760-6bc5318a-b0da-48c3-98ae-64ebbb040346.mp4

请用一段清晰简洁的文字描述问题是什么...

#### 截图或视频：

可以的话，尽可能提供截图或视频来补充描述你的问题...

#### 如何复现（请务必完整填写下面内容）：

1. 你是如何使用 amis 的？
`sdk`、`npm` 或`其他`...

2. amis 版本是什么？请先在最新 beta 版本测试问题是否存在

3. 粘贴有问题的完整 `amis schema` 代码：
```
code here...
```

4. 操作步骤
请简单描述一下复现的操作步骤...

Start by reproducing the official AMIS examples page on the reported Android phone and inspect the attached screenshot and video. Compare the three-dash menu behavior in the official examples with the amis-admin menu toggle; done means the menu opens reliably and the toggle is visible on the reported mobile layout.

Written by the indexing model from the issue text.