Update hitrace-bench version for new filters

[Narfinger]

Update hitrace version for new filters.
Originally we used Load Status change started but that does not seem to be emitted anymore. So we changed to HeadParsed.
The changes to hitrace-bench can be seen here: openharmony-rs/hitrace-bench@416472e

Ideally we probably want to read the filters from a file in the future.

I tested these changes on the OHOS spare infrastructure.

[jschwe]

Originally we used Load Status change started but that does not seem to be emitted anymore. So we changed to HeadParsed.

Lets use a self-defined string in servoshell for the event name instead of using the Debug implementation (since that can change without us noticing). If we match on the enum, we will / CI will notice name changes.

[Narfinger]

While this is probably a good idea, the current problem seems to be that LoadStatus::Started is never send.