[For Consideration] - Prefers reduced motion fallback

[AliT3]

Description:

If a Lottie animation includes a marker named "reduced motion" (or "reducedMotion", "reduced_motion", etc) and UIAccessibility.isReduceMotionEnabled is true, that marker will be be played instead of any other animation that was configured.

Current support:

• iOS - Yes (Play "reduced motion" marker if UIAccessibility.isReduceMotionEnabled is true airbnb/lottie-ios#2110)
• Android - No ([a11y] Check for reduced motion frame names airbnb/lottie-android#2451)
• Web - No

[mbasaglia]

Should this also be used for like previewing lotties as static images?

btw I'd rather have a singular (case-sensitive) value than multiple options for the special name for ease of implementation.