FW: Statusbar Brightness Slider Correction

Correct the Statusbar brightness slider adjusment option, corrects the issue of the settings not being saved.

Also removed tabs from some code and replaced with plan spaces.

Change-Id: Ic7ae16f449e90b264c0097a0d3b8f351735e4368
update-api

Change-Id: I77e6d537d5ebbe67bac26c6ef6d0dda498640ca0