title: matchscore method always return 0 using the "doTrackIdAsync" method with the Gracenote mobile android GNSDK
body: <p>I have been playing with the new Gracenote mobile android GNSDK and while using the "doTrackIdAsync" method, I have noticed that the response has a method matchscore()  and a method matchconfidence() which have been recentky added but they always returns respectively 0 and an empty string. I was wondering if there was an option that needed to be turned on in order to get those values returned. Are those method already implemented or they are not available to use yet ? I have not seen any mention of it in the documentation. </p>