Notification: Fix auto discard

Some profiles (Opp / pbap) are discarding all bluetooth notifications at
startup of Bluetooth.
This change will make the opp notification behind discard by opp and the
pbap being discard by pbap, allowing the other notification to persist
untiil the user dismiss them (airplane / auto on / …)

Bug: 331896688
Fix: 331896688
Test: m com.android.btservices
Test: Full manual There is no test around notification lifecycle
Change-Id: I6d4f1b540b0bc6809584958ac477dc35051e5bc3