Add Firebase (Android)

npx expo install @react-native-firebase/app @react-native-firebase/crashlytics

app.json plugin config; place google-services.json in android/app/.

Crashlytics

import crashlytics from '@react-native-firebase/crashlytics';
crashlytics().log('User opened paywall');
crashlytics().recordError(new Error('Custom error'));
crashlytics().setUserId(userId);