Femtocell Market Size, Share, and Industry Analysis, By Type (2G Femtocells, 3G Femtocells, 4G/LTE Femtocells, and 5G Femtocells), By Technology (IMS/SIP (IP Multimedia Subsystem/Session Initiation Protocol) and IU-H (User Equipment in Home)), By Application (Indoor and Outdoor), By End-user (Residential, Enterprises, and Public Spaces), and Regional Forecast, 2025-2032