Settings: Always set text value in color temperature

onProgressChange is not always called if we set the
color temperature to minimum, since it is the default
value (no change).
Causing the text showing the color temperature is empty.

Call onProgressChange explicitly during init.

FEIJ-1581

Change-Id: I7e0f8995cfc62a53770e787dc649109b9c3bf189
(cherry picked from commit 60455643)