[1/3] framework: volume wake

If enabled pressing volume key will wake the device
and screen. If screen is off because of the proxi
sensor e.g. in call it will not be handled.

PS2:
whitespaces

PS3:
rebased

Conflicts:
	core/java/android/provider/Settings.java

Change-Id: I189bcfed7228f24c030784d490fb7a35e382b7f6