LeAudioService: Set inband ringtone flag only for active devices

If inband ringtone is supported by the phone, it should be exposed over
GTBS only for device which is active.

This patch assures that, all the devices from the active group have flag
set, and all devices from not Active groups have this flag cleared

Bug: 242685105
Bug: 260660659
Test: atest BluetoothInstrumentationTests
Test: manual tests
Tag: #feature
Change-Id: I6f55f93aeb223ae4d74d4d5dc7058a60da0804e4