PBAP: Fix device name update on authorization prompt from Notification.

Use FLAG_ONE_SHOT for Notification PendingIntent to launch
authorization prompt and display the updated device name for
every new PBAP connection request.

Change-Id: Ic9cbed92e2856ed2d2f4f807f7f8c39df7f98762
CRs-fixed: 515221
Merge "PBAP: Fix device name update on authorization prompt from Notification." into jb4.3