Use OSSDK foreground app information
Use OSSDK foreground app information

Summary: The OSSDK gives us a better API for getting the current foreground app.  It doesn't seem to have the issues of the previous implementation.

Differential Revision: D20568949

fbshipit-source-id: e76dda627b66ff4e4f2dd1525de19b225c9a57a9

facebook/SoLoader,facebook/SoLoader,facebook/SoLoader