fix: [SDK-4342] guard against missing EventEmitter to prevent crash on Old Architecture#1938

fadi-george wants to merge 2 commits intomainOneSignal/react-native-onesignal:mainfrom

fadi/sdk-4342-guard-against-missing-eventemitter-in-eventmanager-toOneSignal/react-native-onesignal:fadi/sdk-4342-guard-against-missing-eventemitter-in-eventmanager-toCopy head branch name to clipboard