fix: expo refresh control and audio bugs

🎯 Goal

Whenever unmounting, the recording is already cleaned up and we don't need to do anything - hence the null check
RN's RefreshControl used in a FlatList does not seem to be working well and this is a well known issue that sometimes happens; fortunately the FlatList exposes its own API to spin up an internal RefreshControl through the refreshing and onRefresh properties which work fine
- Really curious why this only behaves poorly on Expo though, might dive deeper into it at some other point to peek a bit under the hood

iOS

Before	After

Android

Before	After

[ ] I have signed the Stream CLA (required)
[ ] PR targets the develop branch
[ ] Documentation is updated
[ ] New code is tested in main example apps, including all possible scenarios
- [ ] SampleApp iOS and Android
- [ ] Expo iOS and Android