WOW!!  Sorry to hear that!!   

I would remove the app on your phone because I also have heard of an error with Android and a back door hack that allowed access to peoples phones which in turn caused others to lose bitcoins.

I am surprised about Coinbase.......use them as well and chose them because they are U.S. based. 

I hope karma works in your favor.........bad luck to all the bitcoin theives out there!!  It is a shame people have to steal.