Change `Point` constructor to `protected`

[msbit]

Change the Point constructor from the default package-private access to protected

[ticofab]

Hey @msbit , thanks for opening this PR! What is the purpose/use case of this change?

[msbit]

Ha yes, I was thinking it would tighten up where/how a Point could be instantiated because otherwise you could do something like:

WayPoint.Builder builder = new WayPoint.Builder();
Point point = new Point(builder);

but then when I actually tried to put that together, I get:

error: Point is abstract; cannot be instantiated

(of course).

It's up to you whether that additional protected is useful signal, or confusing noise, I'm happy either way now that I've actually tested it out :)

[ticofab]

Thanks for testing it out and your comment. I'd rather keep things consistent so I'm going to close it without merging and thanks again for your PR and inputs!

[msbit]

Yep all good mate.