Remove duplicate definition of assistant screen type

Bug: 36645014

Test: manually verified previous screen is logged correctly
      after creating a contact from assistant

- The two types are actually defined in unbundled package

Change-Id: I9726a7ba106f163d214228431886fea690854b6c
(cherry picked from commit 6cda631cb8e2fc7365fc229e5ca43115a3781591)
1 file changed