fix(Netflix): pause and showsmallimages issues

[iuriineves]

Description

• Set timestamps to 0 when the video is paused - setting it to null breaks the .setActivity() function, only updating the information when the video is running;
• Set smallImageKey to null when showSmallImages is false - setting it to "" didn't remove the image.

Closes #9031.

Acknowledgements

• I read the Presence Guidelines
• I linted the code by running yarn format
• The PR title follows the repo's commit conventions

Screenshots

Proof showing the creation/modification is working as expected

(pausing)

(showSmallImages set to false)

[Timeraa]

When you want to not show a certain thing just remove its property from the setactivity, setting it to something invalid will just cause more issues

[iuriineves]

When you want to not show a certain thing just remove its property from the setactivity, setting it to something invalid will just cause more issues

The way the activity is coded, it has to be set to null for some reason. When I was testing it, setting smallImageKey to an empty string didn't remove the image, but setting it to null did.

Fixed

[Timeraa]

When you want to not show a certain thing just remove its property from the setactivity, setting it to something invalid will just cause more issues

The way the activity is coded, it has to be set to null for some reason. When I was testing it, setting smallImageKey to an empty string didn't remove the image, but setting it to null did.

I pushed to the PR, look at what I changed, learn more about it here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax