add updateCriteria method

[Cam Mace]

In the case of map querying, I want to update the query radius and center when the map camera finishes moving. This requires calling both setCenter() and setRadius() which both internally call setupQueries(). I'm proposing adding an updateCriteria method which takes in both a new radius and center GeoPoint, setting the values and then calling setupQueries().

cc: @theonlynick0430

[Lorenzo Calisti]

I was looking for the same function and reading the GeoQuery.java file i found that this methods exists already.