Last screen: don't reduce image quality
BatteryInfoManager: use charged sound without looping flag
The original file had ANDROID_LOOP flag set making it play over and over
when device got charged
Brightness: allow lower values for minimum brightness level
ModElectronBeam: safer handling of Screen off effect option
Animation duration was being set always to 400ms regardless of what
option for CRT was set. 400ms value can cause issues on some devices
where system default is zero.
This change requires rebooting after changing Screen off effect option.
More efficient than to reload big prefs everytime screen is being
prepared for screen off