Merge "Have NetworkMonitor validate VPNs that request it." am: f4947afd54

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/1973959

Change-Id: If686d11294b775b4ba7c5e8cfd36f3675df016b5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>