Attach (recommended) or Link to PDF file here: 
[A Sample PDF Clean 0 degree with all annotations-original-rotated.pdf](https://github.com/mozilla/pdf.js/files/6551789/A.Sample.PDF.Clean.0.degree.with.all.annotations-original-rotated.pdf)

Configuration:
- Web browser and its version: all browsers, tested with Chrome and Firefox latest versions.
- Operating system and its version: tested in Windows 10
- PDF.js version: current (online version)

Steps to reproduce the problem:
1. Visit https://mozilla.github.io/pdf.js/web/viewer.html
2. Upload the file above
3. Notice that several annotations such as arrow, freehand & polyline are missing (compared to Acrobat Reader)
![image](https://user-images.githubusercontent.com/45581023/119781014-11d35d00-befd-11eb-8daa-64f15374cf5b.png)


What is the expected behavior?
- Should display all annotations accordingly to Acrobat Reader

What went wrong? 
- Several annotations are missing such as arrow, freehand & polyline
- Opacity property is not supported and cannot be retrieved via getAnnotations 

this.data.fieldValue = this.data.buttonValue = null;
    
    
    const fieldParent = params.dict.get("Parent");
    if (isDict(fieldParent)) {
      this.parent = params.dict.getRaw("Parent");
      const fieldParentValue = fieldParent.get("V");
      if (isName(fieldParentValue)) {
        this.data.fieldValue = this._decodeFormValue(fieldParentValue);
      }
    }
    
    const appearanceStates = params.dict.get("AP");
    if (!isDict(appearanceStates)) {
      return;
    }
    const normalAppearance = appearanceStates.get("N");
    if (!isDict(normalAppearance)) {
      return;
    }
    for (const key of normalAppearance.getKeys()) {