Unit test for onHotplug when 5V status is true

Unit test for ag/25753464 to check if onHotplug function sending
<System Audio Mode Request> [Source's Physical Address] or not. What we expect is not to power on the audio system.

Bug: 307811135
Test: atest com.android.server.hdmi.HdmiCecLocalDeviceTvTest#onHotplug_doNotSend_systemAudioModeRequestWithParameter
Change-Id: Idf482b5a7e4560d174fec10a43f454d61fcda694