Show the feedback icon on all notifications

With no adjustment extras if no adjustment was active on
the notification

Test: NotificationInfoTest
Test: NotificationConversationInfoTest
Test: PartialConversationInfoTest
Fixes: 428671193
Flag: android.app.notification_classification_ui

Change-Id: I7b0ad3cbc9c133e720c6927b2566c33aeb16da29