imageoverlay: Draw a circle around the face if the image is not loaded
imageoverlay: Draw a circle around the face if the image is not loaded

Change-Id: I0dfc523909c122c86bacf7e492b4b0885ceca953

Kurento/kms-core,KurentoLegacy/gst-kurento-plugins,Kurento/kms-core,ESTOS/kms-core,shelsonjava/kms-core,ESTOS/kms-core,KurentoLegacy/gst-kurento-plugins,shelsonjava/kms-core,TribeMedia/kms-core,Kurento/kms-core,ESTOS/kms-core,KurentoLegacy/gst-kurento-plugins,Kurento/kms-core,KurentoLegacy/gst-kurento-plugins,TribeMedia/kms-core,shelsonjava/kms-core,ESTOS/kms-core,TribeMedia/kms-core,shelsonjava/kms-core,TribeMedia/kms-core