CTS Verifier tests for always-on VPN

This CL adds CTS Verifier tests for DO Disclosures that tell the user
when an always-on VPN is set by the admin.

Bug: 32692748
Test: CTS Verifier > Managed Provisioning > Device Owner Tests >
Privacy info test > Always-on VPN.*

Change-Id: I9fcb7bd96e689c4eccd4416c1e042051535e203a
7 files changed