Sync prediction client and folders

- Notifies prediction client when a folder is converted into workspace
item as a result of losing all items but one.
- Notifies predction client when a folder is created from an item in the
workspace with no duplicates.

Bug: 148749638
Test: Manual
Change-Id: Ifd51a6fe2a40c8baf4d88e2dba1e5bdc925e1608