Broadcast active device only when Audio Fwk update AudioDevices

when HFP SCO Management is enabled, HFP will behavior similar as A2DP and LE Audio, in which only sends broadcast when Audio Fwk updates Audio Device

Bug: 372328032
Bug: 315234036
Flag: com::android::bluetooth::flags::is_sco_managed_by_audio
Test: atest HeadsetServiceTest
Change-Id: I56e10c8829b7996d56dad47af39bb0e93878dc79