fix: added accessible names for start/stop autoplay button #5821

Job	Run time
Verify (packages/styles)	50s
Verify (packages/components)	2m 44s
Verify (packages/eslint-plugin)	49s
Verify (packages/theming)	46s
Verify (packages/tokens)	49s
Verify (packages/docs)	8m 6s
Verify (packages/placeholders)	47s
Verify Chromatic	1m 48s
	16m 39s

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