What is the "Verifying XXX.app" dialog and how do I get passed it? I'm trying to open a new app that I downloaded on OS X Yosemite 10.10.  Specifically, it is Android Studio.app version 0.8.13.  

When I open it, I see the following dialog "Verifying Android Studio.app...":



The progress bar has been at 100% for about 10 minutes and it hasn't gone away.  Granted, this app is rather large at about 25gb of SDK that needs to be included in the directory.

How do I get passed this dialog?
One option to close stuck verification dialogs is to select CoreServicesUIAgent in the Activity Monitor's list of processes and kill it.
Or type in Terminal
 killall CoreServicesUIAgent