Fix there are no folders in NavigationView Pinned file manager

Fix there are no folders in NavigationView Pinned file manager

Procedures

1.Go to Settings -> Security ->Screen pinning and Open the screen pinning.
2.Go to FileManager and Callout the Recents Task.
3.Press the screen pinning button and lock the CMFileManager screen.
4.Press back key sometimes when the scren pinning toast show.
5.Open DrawerLayout and Press the Internal storage
6.Press the All to enter NavigationView.

There are no folders in NavigationView.

Change-Id: I7bbdad87812a66c346c4632886b42c3c79540373