Remove lights settings unless intrusive LED bools are true

com.android.internal.R.bool.config_intrusiveNotificationLed
com.android.internal.R.bool.config_intrusiveBatteryLed
Light settings: reduce tone if preview image color is very light

Prevents material whiteout in color preview.

Change-Id: Idfa47e57bdb669b17b610b737d0fe2c942b47d78