SpatializerHelper: fix sensor reinitialization

Force reinitializing the sensors if the headtracking is enabled
for a given device and headtracker is not available.

Bug: 244430716
Test: repro steps in bug
Change-Id: Ic16f5be105ae5a95217bf55c2b454fbbbea54893

services/core/java/com/android/server/audio/SpatializerHelper.java

@@ -1115,6 +1115,9 @@ public class SpatializerHelper {
                 && ROUTING_DEVICES[0].getAddress().equals(ada.getAddress())) {
             setDesiredHeadTrackingMode(enabled ? mDesiredHeadTrackingModeWhenEnabled
                     : Spatializer.HEAD_TRACKING_MODE_DISABLED);
+            if (enabled && !mHeadTrackerAvailable) {
+                postInitSensors();
+            }
         }
     }