[menu] SRs not properly announcing expanded state

Duplicates

• I have searched the existing issues

Latest version

• I have tested the latest version

Current behavior 😯

If you create a menu and apply the proper aria properties, the screen reader does not properly announce when the menu is expanded. The screen reader announces the menu is collapsed however.

I have verified with NVDA (Windows) and the OS X VoiceOver.

Expected behavior 🤔

The screen reader should announce when menu is expanded by clicking the related button or pressing enter via the keyboard.

Steps to reproduce 🕹

Steps:

1. Go to https://mui.com/material-ui/react-menu/ and observe the Basic Menu example.
2. Use the CodeSandBox button to run the code associated with the button and menu (https://codesandbox.io/s/u2u8cx?file=/demo.js)
3. Using a Screen Reader (i.e. NVDA with Windows), you will notice the menu is initially announced as COLLAPSED (which is correct).
4. Click the button or press enter on the button. You will notice the screen reader does not announce the menu as EXPANDED. However, the aria-expanded property is properly set.

Context 🔦

No response

Your environment 🌎

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  Output from `npx @mui/envinfo` goes here.