Revert "Enable Sharesheet ranking using PeopleService by default to test in Droidfood"

This reverts commit 2327596f.

Reason for revert: <The flag has been propogated from server side to Droidfood devices>

Bug: 157500121
Change-Id: Ic96789cffd6c307147f5a6e279e0729450d4f8c2