Cleanup log in MultiNetworkConnectivityTestActivity It's a follow up of aosp/1666827. Log does not need these .getNetId calls as they're actually added to a string. Just use network since the id information is in the toString. Bug: 182859030 Test: make CtsVerifier Change-Id: Id144779c6c635fb0423d48e9b9f233fded2cd1f0