Move breathing SMS into PAC Settings (2/3)

Change-Id: I81e0d5667533a89ac1bbc9fc49f8e8950a5b24db

Conflicts:
	res/values/strings.xml
	res/xml/preferences.xml
	src/com/android/mms/transaction/MessagingNotification.java
	src/com/android/mms/ui/MessagingPreferenceActivity.java