Connection Type to include Cellular Network Technology (e.g. 3G, 4G LTE, 5G)

[brustolin]

Description

Sentry events currently show Connection Type, but only with values wifi, ethernet, cellular, or null. https://github.com/getsentry/sentry-java/blob/5b8a9a6b2d40e03d1e5d0a38237db370c0f6cfd0/sentry-android-core/src/main/java/io/sentry/android/core/internal/util/ConnectivityChecker.java#L195

Extend the connection_type field to include cellular network technology (3G, 4G LTE, and 5G etc.).

From getsentry/team-mobile#150

[brustolin]

Swift snippet

import Network
import CoreTelephony

func checkNetworkType() {
    let monitor = NWPathMonitor()
    let queue = DispatchQueue(label: "NetworkMonitor")

    monitor.pathUpdateHandler = { path in
        if path.status == .satisfied {
            // Device is connected to the internet
            if path.usesInterfaceType(.cellular) {
                // Cellular connection
                let networkInfo = CTTelephonyNetworkInfo()

                if let carrierType = networkInfo.serviceCurrentRadioAccessTechnology?.values.first {
                    switch carrierType {
                    case CTRadioAccessTechnologyLTE:
                        print("Connected via 4G (LTE)")
                    case CTRadioAccessTechnologyNRNSA, CTRadioAccessTechnologyNR:
                        print("Connected via 5G")
                    default:
                        print("Other cellular network (3G, etc.)")
                    }
                }
            } else if path.usesInterfaceType(.wifi) {
                print("Connected via WiFi")
            }
        } else {
            print("No internet connection")
        }
    }

    monitor.start(queue: queue)
}

[brustolin]

It's also worth noting that we could replace the current SentryReachability class with NWPathMonitor, we need to investigate the effort.