Add testWifiManagerNetWork to STS Bug: 170661738 Test: sts-tradefed run sts-engbuild-no-spl-lock -m CtsNetTestCases Change-Id: I5de27b7f45196e4e17ff2c45e2262c987c72e514 Merged-In: I5de27b7f45196e4e17ff2c45e2262c987c72e514