NotificationChildrenContainer apply the roundness on NotificationHeaderViewWrapper too

Test: atest NotificationChildrenContainerTest
Test: Checking the roundness behavior by disabling the parent (ExpandableNotificationRow) clipping: I override childNeedsClipping() and if (child == mChildrenContainer) return false
Bug: 263822538
Change-Id: I6b08703c4fcf86ca0e939e8adf640053a297f9ca
2 files changed