Add a test to check if the VPN type is set or not

Bug: 184261389
Test: atest CtsHostsideNetworkTests:HostsideVpnTests#testDefault
Original-Change: https://android-review.googlesource.com/1733785
Merged-In: I7ed5989ec767494c1033dc01242b32724e120c4e
Change-Id: I7ed5989ec767494c1033dc01242b32724e120c4e
1 file changed