The Kronos Quartet is a collaborative endeavor, but no rational observer could miss the fact that the group’s character — its restless sense of adventure, its stylistic breadth — reflects the imprint of founding first violinist David Harrington. An evening spent in Harrington’s company is a glimpse into a manic and musically omnivorous mind, one attached to the world’s biggest and most jumbled record collection. David Harrington and Friends, an event curated by San Francisco composer Dan Becker, offers just such an encounter.