setGridChildCount doesn't have any effect

[AdeelTariq]

Hi,

It looks like since the mShimmerLayoutManager is only created once when View is created, calling methods like setGridChildCount or setDemoLayoutManager don't have any effect.

So, for example a simple layout with a just a RecyclerView can't be reused with different grid child count or grid child count can't be changed on orientation change etc.