Ignore the client receiver state for headtracking data

audio_receiver_state_ does not track the DSA mode. So headtracking data
over ISO channel is ignored before it could be consumed by HOGP.

Test: mmm packages/modules/Bluetooth
Test: Manual | LE audio streaming with device supporting DSA
Bug: 270986119
Bug: 309665975
Change-Id: I7fca0b675ebd852df722b4bfa33cd5574a6b94c6