Update signald tracking mr 14 2020 07 24

This updates our fork to track upstream updates to reconciling signald with the new version of libsignalservice-java as of 2020-09-24:

• repo: https://gitlab.com/thefinn93/signald
• branch: automated-upgrade/com.github.turasa-signal-service-java
• commit: ae7e8e4d
• MR (as of 2020-07-22): https://gitlab.com/thefinn93/signald/-/merge_requests/14