menus and images

...

 Changes to be committed:
	new file:   res/drawable-xhdpi/ic_settings_home.png
	new file:   res/drawable-xhdpi/ic_settings_performance.png
	new file:   res/drawable-xhdpi/ic_settings_themes.png
	modified:   res/values/strings.xml
	modified:   res/xml/settings_headers.xml
	modified:   res/xml/sound_settings.xml
	modified:   src/com/android/settings/SoundSettings.java