[CMFileManager] Fix "File Manager isn't responding..." pops up after tapping...

[CMFileManager] Fix "File Manager isn't responding..." pops up after tapping "Secure storage" in File Manager

Procedures
1.Go to “File Manager”.
2.Press "Menu" icon on upper left corner,and then tap "Secure storage".
3.Select "CANCEL" when the note "Create storage" pops up.
4.Repeat Step2 again,check the phone

Have no response when pressing "Secure storage",wait about 10-20s,the note "File Manager isn't responding..." pops up.

Change-Id: I8ce4b55002d6fc34f89c4a59404469e7f3637cbc