protected boolean isAnimating() {
    return mIsAnimating;
  }
Sets a new zoomable transformation and animates to it if desired.

<p>If this method is called while an animation or gesture is already in progress, the current
animation or gesture will be stopped first.

@param newTransform new transform to make active
@param durationMs duration of the animation, or 0 to not animate
@param onAnimationComplete code to run when the animation completes. Ignored if durationMs=0
samples/zoomable/src/main/java/com/facebook/samples/zoomable/AbstractAnimatedZoomableController.java