cmsdk: add persisted key value for status bar tiles

The persisted one simply contains the user, the publishing package, and
the tile tag - items which can be persisted across reboots to restore
the tile's properties on boot properly.

Ticket: CYNGNOS-2530

Change-Id: If770557482e81ab0dd0d16c3ac8be0b2b51e653a
Signed-off-by: Roman Birg <roman@cyngn.com>
(cherry picked from commit 10f165d5)