HeadTracking: Make QuarternionUtil.h available

Required to interpret Pose data outside of libheadtracking.

Test: atest libheadtracking-test
Bug: 269620212
Change-Id: I9a20008d985f8b9448149c12815bc5e76fb2186f
diff --git a/media/libheadtracking/PoseBias-test.cpp b/media/libheadtracking/PoseBias-test.cpp
index 9f42a2c..659dda0 100644
--- a/media/libheadtracking/PoseBias-test.cpp
+++ b/media/libheadtracking/PoseBias-test.cpp
@@ -17,7 +17,8 @@
 #include <gtest/gtest.h>
 
 #include "PoseBias.h"
-#include "QuaternionUtil.h"
+
+#include "media/QuaternionUtil.h"
 #include "TestUtil.h"
 
 namespace android {