This site is built on people sharing their work. You should check where it came from or at least link where you got it from instead of just posting up the direct link to the apk.
It's this sort of thing that stops people sharing their work. No contributors means no XDA developers.
As for you only checking the general section, that's no excuse. If you had posted this in the correct place, you would have seen that it originated from here in the first place.
As for it being Sony's work, it still required that the apk be modified and signed so it could be installed as a user app and not have to be manually pushed to /system/app.
If that hadn't been done, you wouldn't have it on your phone at all.
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