1. Fix mSpans in StaggeredGridLayoutHelper may be null cause exception.
2. Fix sticky listener and npe.

1. Fix sticky listener pass null on unticky.
2. Fix item change should not clear layout info.
3. Fix sticky listener callback not correct.
4. Avoid use of arrayMap which may cause class cast exception.

Fix view lifecycle on sticky listener, fix layout error when use padding in RangeGridLayoutHelper.

Add can scroll listener.

ViewLifeCycleListener no longer require offset.

Add listener for sticky status.

Optimize performance with large number of cards.

Add ViewLifeCycleHelper and ViewLifeCycleListener to invoke correct view life cycle when call VirtualLayoutManager#setRecycleOffset.

Fix reverse cantor not correct. Fix #358, Fix #344

Add interface to control can scroll feature.