Merge changes Ie30889de,Ice0c3d62,Idf41e9fb,I72655e6d,I5c99630e,I89aaf134,Idafc607f...

Merge changes Ie30889de,Ice0c3d62,Idf41e9fb,I72655e6d,I5c99630e,I89aaf134,Idafc607f,Id2d530ce into tizen

* changes:
  Updating orientation virtual sensor based on RD-PQ testing
  Updating orientation_filter test file
  Updating orientation_filter based on RD-PQ testing
  Updating SF linear_accel_sensor using sensor fusion
  Implementing SF gravity_sensor using sensor fusion
  Implementing SF orientation_sensor using software sensor fusion
  Updating SF files for software based sensor fusion support
  Supporting Virtual Sensor data based only on event types