Added Low Power Mode and limited freq while screen off
Added Low Power Mode and limited freq while screen off

This commit enables a working Low Power mode through caping the maximum frequency, which is the same cap for screen off. This is far mor effective as setting the conservative governors so it won't be set while screen off anymore

fg6q/android_device_quanta_fg6q,fg6q/android_device_quanta_fg6q,fg6q/android_device_quanta_fg6q,fg6q/android_device_quanta_fg6q