Fix notifications wrong corners after "clear all"

If "Clear all" is pressed in the notification shelf, some notifications may remain with an incorrect roundness state. The solution is to call onSwipeEnd() for each notification at the end of the animation to allow the notification to correctly manage its state.

Test: atest NotificationStackScrollLayoutControllerTest
Bug: 287740047
Change-Id: Iaa1d831b00738acfdfa2309a48a9f54d554300bc