add support for CompressedPointCloud2 message type in Point Cloud2 display

Author: Emre Karincali

rviz_default_plugins/plugins_description.xml

@@ -178,6 +178,7 @@
     <description>
       The Point Cloud2 display shows data from a (recommended) sensor_msgs/PointCloud2 message.
     </description>
+    <message_type>point_cloud_interfaces/msg/CompressedPointCloud2</message_type>
     <message_type>sensor_msgs/msg/PointCloud2</message_type>
   </class>