Verify VPN disclosure message via CTS verifier

Add the following CDD requirement to CTS verifier:

CDD Section: 9.8.4: If device traffic is routed through a VPN, device
implementations:

>>[C-1-1] MUST display a warning to the user indicating either:
That network traffic may be monitored.
That network traffic is being routed through the specific VPN
application providing the VPN.

Bug: 119312756
Test: CTS Verifier -> BYOD managed provisioning -> always-on VPN
Settigns

Change-Id: Ia9090bbdedbe8797f8aa47beafc42b98cefa4e31
2 files changed