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

Merge "Create a new string to alert unsupported vpn start." into main am: 3c569b53 am: 9827ddae am: b4cb5019

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



Change-Id: I3b232d6f1e624f660e906626e5e4d3107070201a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>