code: public void jumpToFrame(int targetFrameNumber) {
      if (mAnimationBackend == null || mFrameScheduler == null) {
        return;
      }
      // In order to jump to a given frame, we have to compute the correct start time
      mLastFrameAnimationTimeMs = mFrameScheduler.getTargetRenderTimeMs(targetFrameNumber);
      mStartTimeMs = now() - mLastFrameAnimationTimeMs;
      mExpectedRenderTimeMs = mStartTimeMs;
      invalidateSelf();
    }
docs: Jump immediately to the given frame number. The animation will not be paused if
  it is running. If the animation is not running, the animation will not be started.
  
  @param targetFrameNumber the frame number to jump to