Implement native wrapper for syncPlatformDetails RPC

Summary: This differential implements native client wrapper over new RPC to sync platform details.

Test Plan:

1. Build native app and log-in
2. Re-build native app with changed PLATFORM_METADATA constants.
3. Run the app calling commRustModule.syncPlatformDetails() in some React.useEffect().
4. Ensure in dynamodb admin that change occured.

Reviewers: kamil, bartek

Reviewed By: bartek

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D12310