1. Apply this diff from @kamil: https://phab.comm.dev/D10327
2. Put a call to `send_auth_metadata_to_js` in one of Rust functions used in the diff linked above. Unfortunately you have to pass dummy hardcoded strings instead of real data from identity service sue to the issue: https://linear.app/comm/issue/ENG-6067/grpc-on-native-physical-device-not-working
3. Subscribe in JS to auth metadata event (as in previous diffs)
4. Launch the app. Ensure that dummy metadata is logged.