audio policy: exclude A2DP and LE Audio whenever SCO is active

Add exclusion of A2DP and LE Audio devices from available output devices
in Engine::filterOutputDevicesForStrategy() when SCO audio is potentially
in use:
1) a call is active and SCO is the preferred device for the PHONE strategy
2) a given strategy is active and SCO is the preferred device for this
   strategy
3) a ringtone is active and we must ring over SCO.
4) a capture is active from BT SCO

Bug: 292037886
Test: make
Flag: EXEMPT bug fix.
Change-Id: Ic12090033dfa8f80f29b571778b4e88eb42c347e