You probably need to report it as a false positive although I have no idea how you would do that on your device, I'll leave that to you.
Here's a blurb I did about that for Windows detections which may help, at least it gives the web page for reporting such things.
It's a false positive, almost certainly.
There are two threads about this on the Sony Xperia support forum, and in one of them is a suggested solution which might work here.
Possible solution (post #10 in the second thread) :
Start Mcafee Security. Press menu button. There uninstall. Give your 6 digits pin. After uninstall start google play download mcafee security and install it. After install start it and re-register with your phone number and 6 digit pin.
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I've been following the first thread for the whole time. Thank you very much. This actually worked!