DisputedTx::updateVote

Update our vote given progression of consensus.

bool
updateVote(
    int percentTime,
    bool proposing);

Updates our vote on this disputed transaction based on our peers' votes and how far along consensus has proceeded.

Name	Description
`percentTime`	Percentage progress through consensus, e.g. 50% through or 90%.
`proposing`	Whether we are proposing to our peers in this round.

Whether our vote changed