Fix failed identity key sync from contact sync

These were failing because ByteBuffers from the protobufs need to be converted
to ArrayBuffers. Fixed by useing the existing handler in MessageReceiver to
process verified messages from contact sync messages and dispatch them as their
own events, reducing some complexity on the application side.

// FREEBIE

js/background.js

@@ -163,10 +163,6 @@
         }
 
         ConversationController.create(c).save();
-
-        if (contactDetails.verified) {
-            onVerified(contactDetails);
-        }
     }
 
     function onGroupReceived(ev) {

js/libtextsecure.js

@@ -38526,10 +38526,15 @@ MessageReceiver.prototype.extend({
                 var ev = new Event('contact');
                 ev.contactDetails = contactDetails;
                 eventTarget.dispatchEvent(ev);
+
+                if (contactDetails.verified) {
+                    this.handleVerified([contactDetails.verified]);
+                }
+
                 contactDetails = contactBuffer.next();
             }
             eventTarget.dispatchEvent(new Event('contactsync'));
-        });
+        }.bind(this));
     },
     handleGroups: function(groups) {
         console.log('group sync');

libtextsecure/message_receiver.js

@@ -317,10 +317,15 @@ MessageReceiver.prototype.extend({
                 var ev = new Event('contact');
                 ev.contactDetails = contactDetails;
                 eventTarget.dispatchEvent(ev);
+
+                if (contactDetails.verified) {
+                    this.handleVerified([contactDetails.verified]);
+                }
+
                 contactDetails = contactBuffer.next();
             }
             eventTarget.dispatchEvent(new Event('contactsync'));
-        });
+        }.bind(this));
     },
     handleGroups: function(groups) {
         console.log('group sync');