Bump courier-android to 6.1.0

[courier-pr-bot]

Summary

• Bump courier-android from 6.0.1 → 6.1.0 (JitPack).
• Release @trycourier/courier-react-native@6.0.2 and update native user-agent strings (Android + iOS).
• Align example-085 ExampleService with the courier-android 6.1.0 CourierPushNotificationIntent API (named constructor params, simplified presentNotification), and present the demo notification before calling Courier.onMessageReceived.
• Bump example app Android versionCode to 44.

Test plan

• Build example-085 on Android (./scripts/build_demo_app.sh or Android Studio)
• Sign in as a test user and confirm FCM token sync (onNewToken → Courier.onNewToken)
• Send a test push via firebase-fcm and verify:
  • Notification appears with title/body from the payload
  • Tapping the notification opens the app and fires click tracking
  • DELIVERED event appears in the Courier dashboard
• Smoke-test iOS example app build (user-agent version only; no native API changes on iOS)