RFR: 8317886: Add @sealedGraph to ByteBuffer

[Per Minborg]

On Thu, 12 Oct 2023 13:21:08 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> It works well in Buffer as there is a hierarchy to show. It seems a bit confusing to me to have it also show up in the ByteBuffer docs. Have I missed something or what is the reason for doing this?

The idea is to have graphs for every sealed class that has at least one publicly permitted class. ByteBuffer has one permitted public class in the form of `MappedByteBuffer`.

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PR Comment: https://git.openjdk.org/jdk/pull/16142#issuecomment-1767733696