motionDurationScale

What every animation's duration is multiplied by, for a user who wants motion slowed down or switched off across a whole application.

Read from MOTION_DURATION_SCALE_PROPERTY, which accepts a finite, non-negative number: 1 (the default) plays motion at the speed it was written at, 0 ends each animation on its next frame, and a larger value draws motion out. A scale rather than an on/off flag, so "half speed" is as sayable as "no motion at all".