When receiving a group message while in the private group list, the app crashes with this stacktrace:

    java.lang.IllegalStateException
        at org.briarproject.briar.android.privategroup.list.GroupListControllerImpl.eventOccurred(GroupListControllerImpl.java:104)
        at org.briarproject.bramble.event.EventBusImpl.lambda$broadcast$0$EventBusImpl(EventBusImpl.java:42)
        at org.briarproject.bramble.event.-$$Lambda$EventBusImpl$bRn946wCXST7O6nsMZt_9tnkiuk.run(Unknown Source:4)
        at android.os.Handler.handleCallback(Handler.java:883)

Looks like the controller doesn't get its listener attached for some reason.