Public Java property is shown as `val`

For public properties without getter or setter Dokka shows keyword `val` instead of `var`

```java
public class JavaClass {
    public int publicProperty;
}
```

<img width="567" alt="image" src="https://user-images.githubusercontent.com/7689049/174113408-0347616e-ca34-47da-a27d-e0e34199e508.png">

**Installation**
- Dokka version: 1.7.0-dev-170