How Should I Handle This Suspicious App?
There's nothing malicious here. A developer uploaded an app to the play store that has the same package name as a system app from your phone.
The new play store update tweaked the detection of system apps and it linked the apps. This will probably resolved soon. No need to bring the big guns. 

Lookout and other "antivirus" tools don't show anything malicious because they couldn't tell angry birds apart from a nuclear bomb. They are completely useless against any sophisticated attack.