Rotations missing in the external renderer MASA path

In the external renderer binaural MASA path, the rotations are handled through the parametric binaural renderer, which uses the rotations from the decoder (dummy) structure. However, in the external renderer, the head orientation data is not fed to the decoder structure, which makes the MASA rendering to ignore all head rotations. Note: this happens when the EXTERNAL_ORIENTATIONS switch is disabled. When the switch is enabled, the rotations are read from the combinedOrientationData struct, which is passed to the parametric binaural renderer.