AudioService: handle SCO audio activaton for regular VoIP apps

With new SCO audio state management, the audio framework must still call
BluetoothHeadset.startScoUsingVirtualVoiceCall() and stopScoUsingVirtualVoiceCall()
When the activation request comes from apps other than Telecom and Bluetooth.

Bug: 265057196
Flag: android.media.audio.sco_managed_by_audio
Test: make

Change-Id: Ic60e73fc64e7a6095611a75de5b6ae986a3099c9