[SB][Notif] Add click behavior for status bar notif chips in Compose.

Bug: 372657935
Bug: 364653005
Flag: com.android.systemui.status_bar_notification_chips
Flag: com.android.systemui.status_bar_chips_modernization

Test: With Compose chips ON, tap on a notification chip -> verify
notification's HUN appears
Test: With Compose chips OFF, tap on a notification chip -> verify
notification's HUN appears
Test: atest NotifChipsViewModelTest

Change-Id: I75cdd554a6aba9bb904e2778e75ce40d60c701c7