Use bitfield type in GNSS HAL.

Test: mma

Change-Id: I92acf537a489fb06d942d3aa19ec9f40ffe26c23
diff --git a/gnss/1.0/IGnssNavigationMessageCallback.hal b/gnss/1.0/IGnssNavigationMessageCallback.hal
index 6988c9a..0cffa67 100644
--- a/gnss/1.0/IGnssNavigationMessageCallback.hal
+++ b/gnss/1.0/IGnssNavigationMessageCallback.hal
@@ -80,7 +80,7 @@
          * No need to send any navigation message that contains words with parity
          * error and cannot be corrected.
          */
-        NavigationMessageStatus status;
+        bitfield<NavigationMessageStatus> status;
 
         /*
          * Message identifier. It provides an index so the complete Navigation