Revert "Revert "Add VEHICLE_HVAC_FAN_DIRECTION_FACE_AND_FLOOR_FLAG""

This reverts commit ac30be1f366049e5a861f7d35151469106c894c0.
diff --git a/include/hardware/vehicle.h b/include/hardware/vehicle.h
index 22c69bb..9e9f677 100644
--- a/include/hardware/vehicle.h
+++ b/include/hardware/vehicle.h
@@ -272,8 +272,9 @@
  * Bit flags for fan direction
  */
 enum vehicle_hvac_fan_direction_flags {
-    VEHICLE_HVAC_FAN_DIRECTION_FACE_FLAG    = 0x1,
-    VEHICLE_HVAC_FAN_DIRECTION_FLOOR_FLAG   = 0x2
+    VEHICLE_HVAC_FAN_DIRECTION_FACE_FLAG            = 0x1,
+    VEHICLE_HVAC_FAN_DIRECTION_FLOOR_FLAG           = 0x2,
+    VEHICLE_HVAC_FAN_DIRECTION_FACE_AND_FLOOR_FLAG  = 0x3
 };
 
 /**