Delay text to speech calculations until the point they are played out

[davecraig]

If I call Around Me and there's a lot of text, then the distances can be out of date by the time the speech plays. It would be nice to queue the text to speech so that it is output close to live and have the delay calculated at that point. This would mean that the distance to the POI would be accurate for the time it gets played out at rather than the time that the button was pressed at.