Fix IllegalArgumentException in Privacy Guard Manager

On tablets such as manta a this occurs.  To reproduce go into PGM, press
the back button one time, then go back into PGM.

http://pastebin.com/N7XAybUB

Remove privacy guard fragment in onDestroyView

Change-Id: I0deb0701941bfcafcbadf4d68b6fc0be367ef839