Call close() instead of deactivate() in CursorToBulkCursorAdaptor.close()

This seems like a long-lived copy-and-paste bug.

Fixes http://b/issue?id=2015069

This is the master version of change
https://android-git.corp.google.com/g/8636 which never
made it into Eclair.

Change-Id: I75f3a1942994982d5e5f779ab43a573cb953490b