9-axis sensor fusion with Kalman filter

Add support for 9-axis gravity and linear-acceleration sensors
virtual orientation sensor using 9-axis fusion

Change-Id: I6717539373fce781c10e97b6fa59f68a831a592f
diff --git a/services/sensorservice/SensorDevice.cpp b/services/sensorservice/SensorDevice.cpp
index b3c8ef5..38d498c 100644
--- a/services/sensorservice/SensorDevice.cpp
+++ b/services/sensorservice/SensorDevice.cpp
@@ -251,6 +251,9 @@
             }
         }
     }
+
+    //LOGD("setDelay: ident=%p, handle=%d, ns=%lld", ident, handle, ns);
+
     return mSensorDevice->setDelay(mSensorDevice, handle, ns);
 }