fireball: commonize several overlay options

- move to common:
   config_defaultNotificationColor
   config_defaultNotificationLedOn
   config_defaultNotificationLedOff
   config_autoBrightnessLevels
   config_autoBrightnessLcdBacklightValues
   config_autoBrightnessButtonBacklightValues
   config_autoBrightnessKeyboardBacklightValues

- config_screenBrightnessDim already defaults to 10

- config_intrusiveBatteryLed is already defined in s4-common

Change-Id: I6c23e1938db5af4f80806c5bbab8f30c2cd9562a