DO NOT MERGE: Update ConnectivityServiceMock for VPN meteredness bug

This patch updates the ConnectivityServiceMock as part of the fix for
VPN meteredness checks.

Bug: 78644887
Test: Flashed and tested on Walleye
Change-Id: I3d331d5f2d07e476bec4b199c695fd28755f031d
1 file changed