[SB] Increase minimum tap-chip-to-HUN display time to 5 seconds.

Fixes: 407823382
Flag: android.app.ui_rich_ongoing
Test: Show promoted notif, then tap chip -> verify the HUN shows for 5
seconds
Test: Verify other HUNs also by default show for 5 seconds

Change-Id: I34bc35c2c204acafbd02f5450b127832a2018400