BASS: Remove old broadcaster when new synced on the same syncHandle

In case when onSyncEstablished (new broadcaster) came before
onSyncLost (old broadcaster) on the same syncHandle, properly
handle retrieve broadcast ID and remove the old one with notification.

When onSyncLost came, the new broadcaster will be removed but on next
onScanResult will be added again. On the controller nothing change as
on native it is still synced. Such operation is seamless for the user.

Bug: 342552854
Bug: 333691526
Test: atest BassClientServiceTest
Change-Id: I222f35b813132840871088e4ef15fa0cd2f9d15b