private void endDrag() {
        mIsBeingDragged = false;
        mIsUnableToDrag = false;

        if (mVelocityTracker != null) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
    }
Returns true if a fake drag is in progress.

@return true if currently in a fake drag, false otherwise.
@see #beginFakeDrag()
@see #fakeDragBy(float)
@see #endFakeDrag()
dkplayer-sample/src/main/java/xyz/doikki/dkplayer/widget/VerticalViewPager.java