Notify group status inactive when group stops

1. Connect with a LE audio heaset (LEA1)
2. Make a call
3. Connect with another LE audio headset (LEA2)

Then we are expecting the call audio path would be changed
from LEA1 to LEA2. But it is not changed since the active state
of LEA1 is not notified to the LeAudioService, so getActiveDevices
will return LEA1 instead of LEA2.

Bug: 243601282
Tag: #refactor
Test: Confirmed that 2 LEA headsets work as expected
Change-Id: I9dfd7df4d83c6504ed203e047bd616b9f55a92ff