Camera: Don't set brightness progressbar visible if not set

Through skintonedisable brightnessprogressbar is getting enabled,
though that hasn't got triggered.

Fix Made: Use the unused brightnessvisible flag to identify whether
brightness had been triggered or not. If it hasn't got triggered,
then don't enable the progressbar in skintonedisable method.

Change-Id: I72960fb206fb758dd4e330341f5b4f5267d97ac5
CRs-Fixed: 653129
1 file changed