Fix a regression in sync manager

A previous change introduced the regression that we don't let
initialization syncs run - this reverts the original logic.

bug:31056110

Change-Id: I4382af1284a3296c63ab773aa4a52df01deeb853
(cherry picked from commit dfed1c73ec69441a9b77b1d20b1167e5454fea83)
1 file changed