Update ConnectivityServiceMock for change #5642325

This will go to AOSP as soon as it's submitted to master (master-only
tests need to be changed in the same topic first)

Test: atest frameworks/opt/telephony/tests/telephonytests
Test: atest frameworks-net
Test: atest CtsNetTestCases CtsHostsideNetworkTests
Change-Id: Icaa4af57af90bf2ac6742a556ef7f2d4ddfa5319