SystemUi : Port forward statusbar brightness control

Brings back the status bar brightness control from cm-10.2

Change-Id: Icc04e7da3286e9925f8b90528c1e022b33d33e9d
Merge branch 'cm-11.0' of git://github.com/CyanogenMod/android_frameworks_base into cm-11.0

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

Revert "SystemUi : Port forward statusbar brightness control"
http://review.cyanogenmod.org/#/c/53450/