While some are Bricking their way to better digital hygiene, Mitski is ditching her device altogether. She yearns for total detachment — to be “like a bug floating in the melted amber” — on the thundering, theatrical single “Where’s My Phone?,” the first taste of her upcoming album “Nothing’s About to Happen to Me.” It’s a fittingly ambivalent return for an artist who has retreated from public life as her exacting, imagistic songwriting has garnered a cultish following. Mitski embraces the role of the zany recluse in the song’s outré video, which answers the question, “What if ‘Grey Gardens’ was directed by Yorgos Lanthimos?”