Add VpnManager calls to ConnectivityService

This commit adds the relevant calls to ConnectivityService for the
VpnManager API to be functional

Bug: 144246837
Test: VpnManagerTest updated, FrameworksNetTests passing
Change-Id: I446a8595e3583a842a7f89c4f8d74526a85e311c
1 file changed
tree: ab7cdc50b5f56b8d4f965a6b2faf6700ec92c9b0
  1. core/
  2. services/
  3. tests/