Add allowed areas to battlefields, workaround position update 0x05C

[claywar]

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• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

• Adds ability to restrict a BCNM implementation to specific battlefield areas allowedAreas is a table of bools, keyed by the battlefield area ID, so allowedAreas = set{ 1, 3 } will restrict to only areas 1 and 3
• Adds workaround for position update requests from battlefield framework if an area is unavailable

Steps to test these changes

Change allowedAreas to set{ 4 } so that all will be denied for one area, and also check back and forth between valid options.