Add null check for ViewState in SurfaceMountingManager::updateProps

Summary:
I saw that in D95793355 a null check was added for the view state in updateLayout. A similar issue can happen (and has been happening with Reanimated) with the updateProps method, so this diff makes it consistent with the other codepaths.

## Changelog:
[General] [Changed] - use getNullableViewState in SurfaceMountingManager::updateProps and log a soft exception instead

Differential Revision: D97087668