Apple has built its music service on a simple promise. Pay once. Listen without interruption. No ads. No restrictions. That stance set it apart from Spotify for more than a decade. But fresh clues buried in the latest Apple Music beta for Android suggest the walls may be coming down. Strings discovered in the app code point to new subscription options. Messages like “Can’t skip any more tracks” and “Premium access required” have surfaced. The findings, first flagged by developer Aaron Perris on X, arrived just weeks after an Apple executive doubled down on his distaste for free music tiers. The timing feels deliberate. And confusing. Oliver Schusser, vice president of Apple Music, told Billboard’s On the Record podcast in April that he considers the idea of a free tier “a terrible idea.” He spoke with evident pride. “Apple Music is the only service that doesn’t have a free tier, and believe it or not, we are really proud of that.” He framed music as art. Artists spend months in the studio.…