OptionalsilentSuppress the onClipAdded callback for this add. Use when replaying a
clip another participant recorded (received via a sync channel):
onClipAdded is the "a clip was just recorded here" notification that
consumers typically use to broadcast/share the new clip, so firing it
for a replay would re-announce a clip its recorder already announced.
onChange still fires — the composition content did change.
Options for ClipCompositionRef.addClip.