@height8 Good points. The thing itself was last updated in August 2015; everything else was installed from the Google Play Store (I disabled .apk installs.)
I don't really know what could gave caused it, if not a false positive - I've been pretty static as far as new installs go; nothing new for a week or two (outside whatever interval the autoscan is set up at.)
I wonder if I can un-exclude it from scanning now I've… ;)