Add SDK check to check NOT_VCN_MANAGED

Only consider networks as VCN managed if they do not have
NOT_VCN_MANAGED and the platform is at least S, as before S the
NOT_VCN_MANAGED capability did not exist.

Also reorganize net-module-utils to have a specific version for
connectivity, removing other unused classes from net-module-utils.

Bug: 192998401
Test: See tests in next change
Change-Id: I1b57d05088608bdd2e2e0c5ea3caa28f8fa40651