conversations.list() / listAll() do not have consistent behavior across android and iOS

[cameronvoell]

Describe the bug

list() and listAll() methods for conversations returns in Chronological order for iOS and reverse Chronological order for Android

Note this issue is specifically when using the list and listAll method to list conversations. listAll for groups correctly returns in reverse chronological order on both Android and iOS.

Expected behavior

I believe that iOS should return in reverse chronological order for list() and listAll() functions

Steps to reproduce the bug

See the two tests:

https://github.com/xmtp/xmtp-react-native/pull/273/files#diff-4b96887b4344b96a5d9e30cad1e87d74d6d9eab735f00c9c0cbad5e976f1ccb4R283-R400