When the android phone is connected, the shutdown ringtone cannot be output from the outside

When the android phone is connected, the shutdown ringtone cannot be output from the outside
In the startOutput method of AudioMTKPolicyManager. cpp, add the following content after obtaining newDevic:
If (stream = AudioSystem: BOOT) newDevice | = AUDIO_DEVICE_OUT_SPEAKER;

Status_t AudioMTKPolicyManager: startOutput (audio_io_handle_t output,
AudioSystem: stream_type stream,
Int session)
{
ALOGD ("startOutput () output % d, stream % d, session % d", output, stream, session );
......
If (outputDesc-> mRefCount [stream] = 1 ){
Audio_devices_t newDevice = getNewDevice (output, false/* fromCache */);
Routing_strategy strategy = getStrategy (stream );
Bool shouldWait = (strategy = STRATEGY_SONIFICATION) |
(Strategy = STRATEGY_SONIFICATION_RESPECTFUL );
Uint32_t waitMs = 0;
Bool force = false;
If (stream = AudioSystem: BOOT) newDevice | = AUDIO_DEVICE_OUT_SPEAKER;
For (size_t I = 0; I <mOutputs. size (); I ++ ){
AudioOutputDescriptor * desc = mOutputs. valueAt (I );
If (desc! = OutputDesc ){
// Force a device change if any other output is managed by the same hw
// Module and has a current device selection that differs from selected device.
// In this case, the audio HAL must receive the new device selection so that it can
// Change the device currently selected by the other active output.
If (outputDesc-> sharesHwModuleWith (desc )&&
Desc-> device ()! = NewDevice ){
Force = true;
}
// Wait for audio on other active outputs to be presented when starting
// A notification so that audio focus effect can propagate.
Uint32_t latency = desc-> latency ();
If (shouldWait & desc-> isActive (latency * 2) & (waitMs <latency )){
WaitMs = latency;
}
}
}
......
}
Return NO_ERROR;
}