Add testWifiManagerNetWork to STS

Bug: 170661738
Test: sts-tradefed run sts-engbuild-no-spl-lock -m CtsNetTestCases

Change-Id: I5de27b7f45196e4e17ff2c45e2262c987c72e514
Merged-In: I5de27b7f45196e4e17ff2c45e2262c987c72e514
3 files changed