Add Screenshot tests for timestamps

[luixxiul]

Your use case

What would you like to do?

Create Percy tests for timestamps (MessageTimestamp).

Currently most (or all) of the Percy tests are set to ignore timestamps, because any change of their values are always going to be detected and reported as an error while it should not be. There should be a screenshot test to check timestamps attributions without triggering false diff.

Why would you like to do it?

Because the timestamps have a lot of attributions to be checked, such as the place they are displayed, styles like font color and size, etc.

How would you like to achieve it?

I am not sure which way works best.

Have you considered any alternatives?

No response

Additional context

No response