Tune stillness detector for more responsive headtracking

Bug: 243821894
Test: manual - validated through listening tests

Change-Id: I2b07ac16e790d03b05f2ba0912d92901598d2bd5
diff --git a/services/audiopolicy/service/SpatializerPoseController.cpp b/services/audiopolicy/service/SpatializerPoseController.cpp
index e012a0b..97ddd4e 100644
--- a/services/audiopolicy/service/SpatializerPoseController.cpp
+++ b/services/audiopolicy/service/SpatializerPoseController.cpp
@@ -65,13 +65,13 @@
 
 // Screen is considered to be unstable (not still) if it has moved significantly within the last
 // time window of this duration.
-constexpr auto kScreenStillnessWindowDuration = 3s;
+constexpr auto kScreenStillnessWindowDuration = 750ms;
 
 // Screen is considered to have moved significantly if translated by this much (in meter, approx).
 constexpr float kScreenStillnessTranslationThreshold = 0.1f;
 
 // Screen is considered to have moved significantly if rotated by this much (in radians, approx).
-constexpr float kScreenStillnessRotationThreshold = 7.0f / 180 * M_PI;
+constexpr float kScreenStillnessRotationThreshold = 15.0f / 180 * M_PI;
 
 // Time units for system clock ticks. This is what the Sensor Framework timestamps represent and
 // what we use for pose filtering.