FastCharge: Fix return value when FastCharge isn't supported

Change-Id: I39d513f5e0d6c19b1891c08adfa2f2fa63097146
ScreenOnNotificationLed: Add "only when in fullscreen mode" option [1/2]

Change-Id: Ic4122aad07df6007a34c75f4108c62ea6eb9ec52