Revert "Only update default home when the preferred home activity is modified."

This reverts commit cac5c6812a7598caad0535172a0bbc2b676e0339.

Reason for revert: Broke build
Bug: 178191941

Change-Id: Idd8d4e3421fe2f9df1165974359fc2f4294a9725
1 file changed