Merge "Prevent an app to check if the specified VPN app is set VPN always-on" into sc-dev am: 34137fbbff

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15501962

Change-Id: Iddaf38b743337af8aacaa156018b5daa9f3dcc5e