Bump sample apps to RN 0.80.0

The sample apps (RN and Expo) need to be updated to the latest RN version<br>[https://github.com/facebook/react-native/releases/tag/v0.80.0](https://github.com/facebook/react-native/releases/tag/v0.80.0)

[https://react-native-community.github.io/upgrade-helper/?from=0.79.2&to=0.80.0](https://react-native-community.github.io/upgrade-helper/?from=0.79.2&to=0.80.0)