CTS-Verifier loopback allow automatic pass for devices without speaker/mic Bug: 290718118 Test: Run test on device with no speaker/mic. Notice automatic pass. Change-Id: Iaae9d9934d8ba7045b7ae237c1148a6a57b57aae Merged-In: Iaae9d9934d8ba7045b7ae237c1148a6a57b57aae