TWFunc::Fixup_Time_On_Boot: Will now try to read /sys/class/rtc/rtc0/since_epoch to correct time, if that fails it will try to use the ats files to correct time.

TWFunc::Set_Brightness: One single function to set brightness from both the automated functions and the gui actions.

All other files changed to use these changes.

DataManager::Find_Brightness_Path: if TW_BRIGHTNESS_PATH is invalid or unset, TWRP will now attempt to find a sys control path on various known locations.

Change-Id: I7ca582109085dfbcb46b8de73ad031e4b7903fca