Direct Carrier Billing Market Size, Share, and Industry Analysis, By Type (Limited DCB, Pure DCB, and MSISDN Forwarding), By Platform (Windows, Android, and iOS), By Feature (Pre-defined Window, PIN defined, Mobile Originated & Mobile Terminated, and Others), By Application (App Stores, Gaming Industry, Streaming Platforms, Movies & Music, and Others), and Regional Forecast, 2026-2034