Fix HostsideVpnTest#testExcludedRoutes

One of VpnTest#startVpn overloads didn't propagate "excludedRoutes"
param, due to mistake during conflict resolution in aosp/1941233.

Bug: 214398350
Test: atest HostsideVpnTests --iterations
Change-Id: Icbbe7394f1ff1f676cc671a1fa1c4449f4d585e3
1 file changed