[SB][Notif] Only show 1 status bar notification chip per app.

Fixes: 397442330
Bug: 364653005
Flag: android.app.ui_rich_ongoing

Test: Post 2 colorized notifications from test app -> verify status bar
only shows 1 chip, but shade still shows both notifications. Verify
status bar chip is for the first notif in the shade
Test: Post 2 promoted notifs from different apps -> verify 2 chips
appear
Test: Post promoted notif from same app on two different profiles ->
verify 2 chips appear
Test: atest NotifChipsViewModelTest

Change-Id: I12f56b532378dd53288c0533650e78b7bbfeedcd