Merge "Create a new string to alert unsupported vpn start." into main am: 3c569b5379 am: 9827ddae2a

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

Change-Id: I516e6f18f0addc16663f10ca4efe65584d3f0a6f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>