Add icon for kcm_animations (preferences-desktop-animations)

Adds a new icon for kcm_animations for plasma/kwin!7473 (merged).

Modelled after a bouncing ball.

22	32

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Previous versions:

22	32	Description
		Initial version
		Speed lines instead
		Close to final version, with curvier tail that does not appear properly connected to the bigger bounce line
		Almost final version, missing gap

Non-optimised source of final icons: preferences-desktop-animations.zip