Stop scrolling before notifying InstructionListAdapter

[danesfeder]

The epic saga of fixing the instruction list RecyclerView continues. Seeing an IllegalStateException occurring when trying to update the InstructionListAdapter while the RecyclerView is still scrolling:

Fatal Exception: java.lang.IllegalStateException
Cannot call this method while RecyclerView is computing a layout or scrolling android.support.v7.widget.RecyclerView{3139e9ac VFED.... ......ID 0,0-480,618 #7f0800bb app:id/rvInstructions}, adapter:com.mapbox.services.android.navigation.ui.v5.summary.list.InstructionListAdapter@10f27ae3, layout:android.support.v7.widget.LinearLayoutManager@741ace0, context:com.mapbox.logistics.ui.LogisticsActivity@2bce6a5d
android.support.v7.widget.RecyclerView.assertNotInLayoutOrScroll (RecyclerView.java:2769)
android.support.v7.widget.RecyclerView$Adapter.notifyDataSetChanged (RecyclerView.java:6961)
com.mapbox.services.android.navigation.ui.v5.instruction.InstructionListTransitionListener.onAnimationFinished (InstructionListTransitionListener.java:34)
com.mapbox.services.android.navigation.ui.v5.instruction.InstructionListTransitionListener.onTransitionEnd (InstructionListTransitionListener.java:24)

[Guardiola31337]

Seems legit