fix: support check persistent-license to remove the mediakeysession

[JackPu]

This PR will...

It will check if the session type is persistent-license and then make the decision to execute mediakeySession.remove.

Why is this Pull Request needed?

I mentioned the issue here: #6806

We have found the issue on the Samsung and Comcast platforms. It seems we cannot resolve the method mediaKeySession.remove(). Because we cannot close the media session, it will cause the next time session request. It will throw an error like this

TypeError-Failed to execute 'generateRequest' on 'MediaKeySession': Request generation failed. . (99999)

Are there any points in the code the reviewer needs to double check?

Resolves issues:

Checklist

• changes have been done against master branch, and PR does not conflict
• new unit / functional tests have been added (whenever applicable)
• API or design changes are documented in API.md

[JackPu]

I will fix the unit tests later

Waiting for a response to the comments above.

[JackPu]

@robwalch Do you have some other ideas?