[SB][Call] Update call chip click to show notification instead of app.

Promoted notification chips will show the notification when tapped.
Since the call chip is also derived from a notification, it should also
show the notification once we've enabled promoted notification chips.

Bug: 414830065
Bug: 364653005
Flag: android.app.ui_rich_ongoing
Test: With ui_rich_ongoing off, trigger call chip & tap it -> verify
activity is launched
Test: With ui_rich_ongoing on, trigger call chip & tap it -> verify
notification is shown
Test: atest CallChipViewModelTest

Change-Id: Ib75f389201554502a5c03f43b2adff45a0a5d5a2