Android Video Calling Example Not Working

> Please provide us with the following information:
> ---------------------------------------------------------------

### This issue is for a: (mark with an `x`)
```
- [X ] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Minimal steps to reproduce
>
Checkout code
Replace UserToken
Run app
Add callee id
App crashes on join

### Any log messages given by the failure
>

### Expected/desired behavior
> Video Call To Start when clicked on call button

### Versions
> Android 11

### Mention any other details that might be useful

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