Merge "Cancel running LayoutTransition before removing it from a container" into klp-dev

     * the ViewGroup will be animated according to the animations defined in that LayoutTransition

     * object. By default, the transition object is null (so layout changes are not animated).

     *

     * <p>Replacing a non-null transition will cause that previous transition to be

     * canceled, if it is currently running, to restore this container to

     * its correct post-transition state.</p>

     *

     * @param transition The LayoutTransition object that will animated changes in layout. A value

     * of <code>null</code> means no transition will run on layout changes.

     * @attr ref android.R.styleable#ViewGroup_animateLayoutChanges

     */

    public void setLayoutTransition(LayoutTransition transition) {

        if (mTransition != null) {

            mTransition.cancel();

            mTransition.removeTransitionListener(mLayoutTransitionListener);

        }

        mTransition = transition;