Fix 'vibrate on call' option.

JIRA:CYAN-1325
Change-Id: Ia01945aa281a1ebef38c80c5896e5be79c290435

Conflicts:
	res/xml/preferences.xml
	src/com/android/mms/ui/MessagingPreferenceActivity.java

 Author:    Danny Baumann <dannybaumann@web.de>
 On branch jb422
 Changes to be committed:
	modified:   res/xml/preferences.xml
	modified:   src/com/android/mms/ui/MessagingPreferenceActivity.java