Discuss extending `addMediaFile` to accept a file path

The backend [`AddMediaFile`](https://github.com/ankitects/anki/blob/dac26ce67147b261d79a56092320cc2f5af0d990/proto/anki/media.proto#L15) only accepts a byte array, not a file reference

```proto
message AddMediaFileRequest {
string desired_name = 1;
bytes data = 2;
}
```

This increases memory pressure on AnkiDroid for large files, as it does not support streaming , leading to `OurOfMemoryError`.

We may wish to implement this upstream, or as an AnkiDroid-only extension to the backend