Push-To-Talk over Cellular (PoC) Market, Size, Share & Industry Analysis, By End User (Public Safety and Security, Construction, Energy and Utility, Transportation and Logistics, Manufacturing, Travel and Hospitality, and Others), By Solution (Devices (Rugged, Standard, and Others), Software (Cloud and On-Premise), and Services (Network Services, Integration and Deployment Services, and Maintenance and Support Services)), By Enterprise Size (Small, Medium, and Large), and Regional Forecast 2026 to 2034