Stop using ConnectivityManager for VPNs.

These methods have all moved to VpnManager.

Bug: 173331190
Test: atest SettingsRoboTests
Change-Id: I1dd57fa2213b1785a94ec9d6ab4cce3a5d2684ff
Merged-In: I1dd57fa2213b1785a94ec9d6ab4cce3a5d2684ff
9 files changed