Check if we can implement /sys/class/lcd/panel/power_reduce

[cryptomilk]

Check if we can implement /sys/class/lcd/panel/power_reduce

or if this can be achieved differently ...

[cryptomilk]

We need a kernel node to support:

https://github.com/LineageOS/android_hardware_samsung/blob/c939b63c5d110a347705ce4a59c363b697e68619/hidl/livedisplay/AdaptiveBacklight.cpp