Gnss Hal Minor Cleanup

Enum sizes and names cleaned up, fixed errors in comments,
cleaned up some variable names.

Also removed AGnssRefLocation since it appears to be unused.

Bug:31974439
Test: mm

Change-Id: I88f43caac5ce9c7137e28b29ba55ea330786745f
diff --git a/gnss/1.0/IGnssGeofencing.hal b/gnss/1.0/IGnssGeofencing.hal
index 89301f4..8417333 100644
--- a/gnss/1.0/IGnssGeofencing.hal
+++ b/gnss/1.0/IGnssGeofencing.hal
@@ -53,7 +53,7 @@
      * @param unknownTimerMs - The time limit after which the UNCERTAIN transition
      * must be triggered. This parameter is defined in milliseconds.
      */
-    addGeofenceArea(int32_t geofenceId, double latitudeDegrees, double longitudeDegrees,
+    addGeofence(int32_t geofenceId, double latitudeDegrees, double longitudeDegrees,
         double radiusMeters, GeofenceTransition lastTransition,
         int32_t monitorTransitions, uint32_t notificationResponsivenessMs,
         uint32_t unknownTimerMs);
@@ -82,5 +82,5 @@
      *
      * @param geofenceId The id of the geofence.
      */
-    removeGeofenceArea(int32_t geofenceId);
+    removeGeofence(int32_t geofenceId);
 };