Revert "[NS A24] Add an object to represent changes in assignment"

This reverts commit 5c18198aae4f2aba47c0d16de7960f1a4da26f61.

Reason for revert: Toggling wifi on/off causes networking to
 stop working with these four patches applied.
Bug: 146230156

Change-Id: Ie0217796c89abf0dc86e6a4f8324811155dc57cd
1 file changed