Feature : Volume adjust sound preference 2/2

This patch allows the users to choose if they want the audible tone when adjusting the volume

The new preference is in
Settings | Sound
    Volume adjust sound
        Play sound when adjusting volume with hard keys
The Checkbox is defaulted to ON (1 in defaults.xml)

Look for 1/2 for the Framework volume panel change

Change-Id: I6d43cba83bf4cf10f2d50502e7cee5408a73c520

Added changes for my rom carz2

Conflicts:
	res/values/strings.xml
	res/xml/sound_settings.xml