* When no URL is provided to `ContentValidationState.collectMediaState`, assume it's valid
That way we can do:
`if (validationState.isValid() && state.collectMediaState(possiblyNullUrl).isValid()) ...`
* Remove the `eventId` param from `ContentScannerService.scan`
It's not really used, since we then provide a state that can be mutated, and fetching that is what the previous parameter was used for
* Make sure to always validate the medias in the viewer, both the actual media and the thumbnail
* Update screenshots
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Co-authored-by: ElementBot <android@element.io>
Jorge Martin Espinosa
0442fbd307