Addressed API review comments and updated JavaDoc

Bug: 27274532
Bug: 27948390
Change-Id: I0255d2511deab788dcab9815def9c1287a50b7f9
diff --git a/services/core/java/com/android/server/location/GnssMeasurementsProvider.java b/services/core/java/com/android/server/location/GnssMeasurementsProvider.java
index 734a8d4..caf1d6c 100644
--- a/services/core/java/com/android/server/location/GnssMeasurementsProvider.java
+++ b/services/core/java/com/android/server/location/GnssMeasurementsProvider.java
@@ -64,15 +64,15 @@
         int status;
         switch (result) {
             case RESULT_SUCCESS:
-                status = GnssMeasurementsEvent.STATUS_READY;
+                status = GnssMeasurementsEvent.Callback.STATUS_READY;
                 break;
             case RESULT_NOT_AVAILABLE:
             case RESULT_NOT_SUPPORTED:
             case RESULT_INTERNAL_ERROR:
-                status = GnssMeasurementsEvent.STATUS_NOT_SUPPORTED;
+                status = GnssMeasurementsEvent.Callback.STATUS_NOT_SUPPORTED;
                 break;
             case RESULT_GPS_LOCATION_DISABLED:
-                status = GnssMeasurementsEvent.STATUS_GNSS_LOCATION_DISABLED;
+                status = GnssMeasurementsEvent.Callback.STATUS_LOCATION_DISABLED;
                 break;
             case RESULT_UNKNOWN:
                 return null;