[Mobile Replay SDK] Reduce number of Meta events being sent

[michellewzhang]

We are receiving too many meta events from the SDK, which is contributing to some rrweb scrubbing bugs. To fix this, the SDK should reduce the meta events being sent to be:

1. only at the very beginning of the replay (once per replay)
2. only when the orientation changes

(note: the meta events being sent now are not causing bugs, but reducing the number will reduce the amount of data and reduce frontend computation. -- not a blocker, doesn't need to be high priority)

[brustolin]

I didn't get this. What are meta events?

[michellewzhang]

@brustolin they are type 4 events. usually, in web replays, they are only sent once at the beginning of the replay.

they provide meta info like height/width of the display.

[cmanallen]

@michellewzhang @brustolin Still relevant?

[DaveRosenthalSentry]

I suspect this is not actually a bug, but rather is just the current intended behavior. Marking as feature request.