fb: fetch navbar glow color from color.xml

better for new theming engine which will come in future

and now I will start doing again usefull patches lol. Just
needed to do something other.

Change-Id: I35dde45e47c59a2407c191d0077f0adb91f32381

Conflicts:
	packages/SystemUI/res/values/colors.xml

Conflicts:
	packages/SystemUI/res/values/cr_colors.xml
	packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyButtonView.java