VxMark: Put startup chime through the speaker regardless of attached headphones

[arsalansufi]

VxMark: Startup chime audio is directed through the headphones if headphones are plugged in when machine is powered on.

Issue automatically created from Slack feedback reported by caroline:
https://votingworks.slack.com/archives/CJU9MSC6S/p1732216040448599?thread_ts=1732216040.448599&cid=CJU9MSC6S