Verify that VPN name is set in VPN networks am: 5ee9dedb0f am: 6c9969492c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2732954

Change-Id: I238818797d1ef3a9e9e67fbd0da7fcc899c78c8d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>