ATC Communications Market Size & Forecasts 2026-2035, By Segments (Sector, Offering, Airport Size, Airspace), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (AT&T, Verizon Communications, Vodafone, Deutsche Telekom, Telefónica)