audio: SpatializerHelper: fix exceptions when head tracking is not supported

Do not call head tracking APIs on native spatializer when it does not
support head tracking.

Bug: 224623509
Test: manual enabling/disabling of spatial audio
Change-Id: I3be6b3f05c9542404379a07f4fc734e45a75152a
Merged-In: I3be6b3f05c9542404379a07f4fc734e45a75152a