Settings: Port notification drawer custom background (1/2)

Change-Id: If7da7fc82942ea74c46cabd48e0ee874f4c20f0a

	modified:   AndroidManifest.xml
	modified:   res/values/pa_arrays.xml
	modified:   res/values/pa_strings.xml
	new file:   res/xml/notification_bg_pref.xml
	modified:   res/xml/tool_bar_settings.xml
	new file:   src/com/android/settings/cyanogenmod/NotificationDrawerStyle.java

https://github.com/temasek/android_packages_apps_Settings/commit/1812d5919a97c65ca4398f8ee8643167b3404fa7