Revert "Add attribution tags for VCN and VPN"

This reverts commit 694b1875978e730144f448432787a4bd66ef7297.

Reason for revert: <Break VpnManagerServiceTest. See b/286161960>

Change-Id: I4665c257c3cca28f0f657ba0f653ba2068f0d5e2
2 files changed