Better check for prefers-reduced-motion

[r100-stack]

Changes

Based on #2001 (comment). Makes the following change for a cleaner and safer prefers-reduced-motion check:

- getWindow()?.matchMedia('(prefers-reduced-motion: no-preference)')?.matches;
+ useMediaQuery('(prefers-reduced-motion: no-preference)');

Testing

Tests still passing.

Docs

N/A since internal change.