Allow advanced VPN to manage connection status via its UI

Bug: 238641532
Test: atest -c VpnSettingsTest
Change-Id: Ia6f1d84bba38bab7f13f46dc8a4fdb4eb0505f8f
Merged-In: Ia6f1d84bba38bab7f13f46dc8a4fdb4eb0505f8f
4 files changed