Statusbar: Brightness control, (1/2):

Thanks to CyanogenMod:
https://github.com/CyanogenMod/android_frameworks_base/commit/5e85a7cb7fffb4e1efeef0f909f7d5edc6bb74bf
https://github.com/CyanogenMod/android_frameworks_base/commit/8df5ba9c3223edff06bd99cda80ae88a3d95f3f6