Fix for "Can not perform this action after onSaveInstanceState"

We seem to be getting a view pager event after onSaveInstanceState.
Clear the view pager listener in onSaveInstanceState to avoid this,
which is what we do with ActionBarAdapter too.

Bug 5161276

Change-Id: Ic20188c4f6ee0b60c6b6c9ea98709039a68d8073
1 file changed