Unhide AltitudeConverter method to perform non-blocking geoid height calculations.

Test: CtsLocationNoneTestCases
Bug: 304375846
Change-Id: I8db2db2a36a247c8e1f626d590a94c46a275c216
diff --git a/location/api/current.txt b/location/api/current.txt
index c55676b..c7954fe 100644
--- a/location/api/current.txt
+++ b/location/api/current.txt
@@ -682,6 +682,7 @@
   public final class AltitudeConverter {
     ctor public AltitudeConverter();
     method @WorkerThread public void addMslAltitudeToLocation(@NonNull android.content.Context, @NonNull android.location.Location) throws java.io.IOException;
+    method @FlaggedApi(Flags.FLAG_GEOID_HEIGHTS_VIA_ALTITUDE_HAL) public boolean addMslAltitudeToLocation(@NonNull android.location.Location);
   }
 
 }