[SB][Notifs] Show HUN when status bar notification chip is tapped.

Bug: 364653005
Flag: com.android.systemui.status_bar_notification_chips
Test: Enable flag, then tap one of the chips associated with a
notification -> verify its HUN shows up
Test: atest HeadsUpCoordinatorTest
StatusBarNotificationChipsInteractorTest NotifChipsViewModelTest

Change-Id: Idab6b6291912786f39a0c0629e74fae89239dc65