Aman Verma

@ianhanniballake, I have added a destination-level flag and updated the bottom sheet sample to demonstrate the same. I am a little unsure about the performance implications of this approach. Can...

I will try adding tests for these cases.

@jossiwolf I have added basic tests, I can't test the sheet state like in the case of `skipHalfExpanded`( since this value isn't stored in sheetstate) so I have added tests...

cc/ @jossiwolf In case you missed it.