settings: volume rocker controll (wake up and volume) thanks to

CM and omni for the proxy sensor idea

Change-Id: I3dbb8c276fb7c73c8e3ced1624a1ff8e03d9f4ca

Conflicts:
	res/values/slim_strings.xml
	res/xml/slim_sound_settings.xml
	src/com/android/settings/DisplaySettings.java
	src/com/android/settings/SoundSettings.java
	src/com/android/settings/slim/SoundSettings.java
[2/2] Power connect/disconnect notification support

Change-Id: If2103d5cf2a58d5dda7e83853ef681872795c710

Conflicts:
	res/values/slim_strings.xml
	src/com/android/settings/slim/SoundSettings.java