Add CTS tests for PasspointConfiguration, Credential, Credential.UserCredential, Credential.CertCredential, Credential.SimCredential, and HomeSp Bug: 150977126 Bug: 150978132 Bug: 150978391 Bug: 150978125 Bug: 150977972 Bug: 150977655 Test: atest WifiHotspot2Test Change-Id: Ia75b489e0d12cd23ac62000de8ddb2b289ded87b