Does anyone know if we can import Illustrator pattern swatches into an InDesign library or swatch pattern library?
No. Illustrator pattern (and gradient) swatches are not transferable to any other Adobe application.
In addition, InDesign has no ability to create or use pattern swatches.
You can transfer standard color swatches from AI to INDD. Just not pattern or gradient swatches. See here: How to import Illustrator swatch libraries into InDesign - Adobe Indesign Mac?
What about CC libraries ? You can totally share swatches between Ai and ID ;)