services: Fix publishing of ime tile.

  The tile would previously only appear on
  devices which didn't have a navigation bar
  unless the user reset their tiles from edit
  which would trigger it to strangly appear.

  Fix interaction by relying on the same mechanism
  as notifying via the other indicators.

Change-Id: I644b4c5305b647f985584d651a31215d103cf425
TICKET: CYNGNOS-1991