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/IGnssGeofenceCallback.hal b/gnss/1.0/IGnssGeofenceCallback.hal
index 06eb62a..5c70c5e 100644
--- a/gnss/1.0/IGnssGeofenceCallback.hal
+++ b/gnss/1.0/IGnssGeofenceCallback.hal
@@ -69,7 +69,7 @@
  * addGeofenceArea method.
  *
  * Even though the diagram and explanation talks about states and transitions,
- * the callee is only interested in the transistions. The states are mentioned
+ * the callee is only interested in the transitions. The states are mentioned
  * here for illustrative purposes.
  *
  * Startup Scenario: When the device boots up, if an application adds geofences,