Add mobile SDK MeetingSessionStatusCode handling to FAQ

[georgezy-amzn]

Issue #:

Description of changes:

Added 3 topics to FAQ related to mobile MeetingSessionStatusCode:

• What does each MeetingSessionStatusCode mean?
• How should I handle each MeetingSessionStatusCode in my application?
• How to determine if the meeting session stop will be self-recoverable or terminal?

Testing:

Can these tested using a demo application? Please provide reproducible step-by-step instructions.

Checklist:

1. Have you successfully run npm run build:release locally?

2. Do you add, modify, or delete public API definitions? If yes, has that been reviewed and approved?

3. Do you change the wire protocol, e.g. the request method? If yes, has that been reviewed and approved?

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.