[Replay] Long duration replays with replay type: error

We have a replay [here](https://sentry.io/organizations/sentry/replays/javascript:fbe9efbf6801431b8d02fbdaf8902dd7/) with duration > 3 hrs. This is caused because we have some stale events that are being sent. And our UI code is computing the duration by taking the min + max timestamps in the recording events itself.

