keyboard: adding functional alt/shift lights

This is useful for devices that has QWERTY keyboard
and leds for the Alt/Shift (Fn/Caps) keys, like
htc doubleshot.

PS2: Fix whitespace & bracket issues

Change-Id: I66ebc2d881438f5b51db77eaa885421e65a7da0d

Conflicts:
	core/java/android/os/PowerManager.java