Convert all comments into "doxygen-ready" comments.

Bug: 36453077
Test: mma
Change-Id: I0b1f77dfae5d2258969e33d85ecf45401ffbdfaa
diff --git a/automotive/vehicle/2.0/IVehicle.hal b/automotive/vehicle/2.0/IVehicle.hal
index 5de416f..d962de0 100644
--- a/automotive/vehicle/2.0/IVehicle.hal
+++ b/automotive/vehicle/2.0/IVehicle.hal
@@ -25,7 +25,7 @@
    */
   getAllPropConfigs() generates (vec<VehiclePropConfig> propConfigs);
 
-  /*
+  /**
    * Returns a list of property configurations for given properties.
    *
    * If requested VehicleProperty wasn't found it must return