Support MotionDurationScale in the coroutine context

[yogurtearl]

Compose has a MotionDurationScale coroutine key.

see https://developer.android.com/reference/kotlin/androidx/compose/ui/MotionDurationScale

Lottie compose animations should read and use that animation scale.

Should be able to override the MotionDurationScale by using

withContext(CustomMotionDurationScale) { 
      // lottie compose stuff
 }

(this is does not seem to be supported as of Lottie Compose 6.6.2 )

[yogurtearl]

In the meantime, as a workaround, can do something like this:

   val animatable = rememberLottieAnimatable()     
   LaunchedEffect(Unit) {
           val motionDurationScale = coroutineContext[MotionDurationScale]?.scaleFactor ?: 1f
            animatable.animate(
                composition,
                speed = animatable.speed / motionDurationScale,
        ....

Also, MotionDurationScale should maybe be used instead of this bit?

lottie-android/lottie-compose/src/main/java/com/airbnb/lottie/compose/animateLottieCompositionAsState.kt

Lines 62 to 63 in ac2599c

	// Dividing by 0 correctly yields Float.POSITIVE_INFINITY here.
	val actualSpeed = if (ignoreSystemAnimatorScale) speed else (speed / Utils.getAnimationScale(LocalContext.current))

[yogurtearl]

Also, animatable.animate(...) seems to currently always ignore the animation scale regardless of the value of ignoreSystemAnimationsDisabled passed in, which seems like a bug?