Allow changing autoUpdate and updateOnModification in RealmRecyclerViewAdapter

[ridcully99]

Goal

I want to be able to turn autoUpdate and updateOnMofification on and off after the RealmRecyclerViewAdapter has alrady been created.

Having that feature allows me to implement Drag & Drop.

For now I cloned the class changed it accordingly, but it would be nice to have it in the original class.

Expected Results

Be able to do something like this:

RealmRecyclerViewAdapter adapter = new RealmRecyclerViewAdapter(data, true, true);
...
adapter.enableAutoUpdates(false, false);
...
adapter.enableAutoUpdates(true, true);