Fixed two bugs when importing MetaGraphDefs that contain ResourceVariables.

1) In the ResourceVariable implementation, pass import_scope when creating the SaveSliceInfo. This is present in the implementation of plain variables, and was likely a copy-and-paste omission.
2) When importing a MetaGraphDef, restoring the GLOBAL_VARIABLES and TRAINABLE_VARIABLES collections will add ops to the graph for ResourceVariables. Made graph construction deterministic by fixing the order in which collections are restored.

PiperOrigin-RevId: 177144138