Merge branch 'charlesmchen/attachmentEmojis'

SignalServiceKit/src/Messages/Attachments/TSAttachment.m

@@ -181,9 +181,13 @@ NSUInteger const TSAttachmentSchemaVersion = 4;
     if ([MIMETypeUtil isImage:contentType]) {
         return @"📷";
     } else if ([MIMETypeUtil isVideo:contentType]) {
-        return @"📽";
+        return @"🎥";
     } else if ([MIMETypeUtil isAudio:contentType]) {
-        return @"📻";
+        if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(11, 0)) {
+            return @"🎧";
+        } else {
+            return @"📻";
+        }
     } else if ([MIMETypeUtil isAnimated:contentType]) {
         return @"🎡";
     } else {