Merge "Create a new string to alert unsupported vpn start." into main am: 3c569b53

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Settings/+/2831551



Change-Id: I6ee70a33d9c5739ee2e44dcef8158c5f2b7767e2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>