I wouldn't pin too much hope on having a high quality PR written and integrated back to Signal soon. It doesn't look like a top priority for them. OWS also like the telemetry that Play gives them for diagnostics and have stated they won't be looking at FDroid unless someone can replace that.
https://www.reddit.com/r/gnu/comments/4cd451/libresignal_sig...
Perhaps some more volunteers putting effort in could remedy the situation.