Fix: Story Player autoplay and slide advancement issue (#40409)

[Vijayshree25]

Fixes #40409

• Added autoplay on story load
• Prevented skipping of slides when user delays interaction
• Ensured continuous story advancement without manual click

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[Vijayshree25]

@newmuis Hi, requesting review for this PR. Needed for merge.

[Vijayshree25]

Hi @newmuis @rileyjshaw @ampproject/wg-stories,
Requesting CI approval for this PR.
The workflow is blocked with "Awaiting approval" and cannot run.
Thanks!