Fix notification ringtone problems

Default ringtone was often showing up as a call tone

Silent wasn't working correctly globally

src/org/thoughtcrime/securesms/recipients/Recipient.java

@@ -456,7 +456,7 @@ public class Recipient implements RecipientModifiedListener {
     if (ringtone != null && ringtone.getScheme() != null && ringtone.getScheme().startsWith("file")) {
       return null;
     }
-    
+
     return ringtone;
   }