Fix AudioListener3D not tracking velocity for doppler

[RoyBerardo]

This closes #107799

It seems that AudioListener3D did not have any code for using its own velocity for doppler calculation, so I essentially just copied over the Camera3D doppler code. Didn't need to change much at all, the code for the camera doppler calculation does everything it needs to do and nothing more.

Now, doppler works as expected when the listener moves.

This will have a noticeable but also likely preferable change in sound for projects which use doppler and a moving listener.

[RoyBerardo]

Had a realization of something, tested to confirm that it does happen. If doppler tracking is disabled on the listener but enabled on a stream player, doppler will still be heard. I'm on the fence on if this is a bug or not, since the doppler setting enables tracking, not doppler itself. If this IS a bug, should I tackle that in this PR as well? To add, the camera currently exhibits this behavior, so fixing this bug would fix it for both listeners and cameras.

[RoyBerardo]

Had a realization of something, tested to confirm that it does happen. If doppler tracking is disabled on the listener but enabled on a stream player, doppler will still be heard. I'm on the fence on if this is a bug or not, since the doppler setting enables tracking, not doppler itself. If this IS a bug, should I tackle that in this PR as well? To add, the camera currently exhibits this behavior, so fixing this bug would fix it for both listeners and cameras.

I've decided to convert this PR to a draft for now, since I feel this is an important topic to address. It's a very easy fix that can be done in this PR, but I wonder what the best approach would be.

IMO, doppler should only be heard on a sound if both the emitter and listener have doppler enabled. That being said, this would require projects that use doppler and the camera as a listener to enable doppler on the camera, if they haven't already.