Use bitfield type in GNSS HAL.

Test: mma

Change-Id: I92acf537a489fb06d942d3aa19ec9f40ffe26c23
diff --git a/gnss/1.0/default/GnssNi.cpp b/gnss/1.0/default/GnssNi.cpp
index 10af1f4..ec57e8c 100644
--- a/gnss/1.0/default/GnssNi.cpp
+++ b/gnss/1.0/default/GnssNi.cpp
@@ -61,8 +61,7 @@
     IGnssNiCallback::GnssNiNotification notificationGnss = {
         .notificationId =  notification->notification_id,
         .niType = static_cast<IGnssNiCallback::GnssNiType>(notification->ni_type),
-        .notifyFlags =
-                static_cast<IGnssNiCallback::GnssNiNotifyFlags>(notification->notify_flags),
+        .notifyFlags = notification->notify_flags,
         .timeoutSec = static_cast<uint32_t>(notification->timeout),
         .defaultResponse =
                 static_cast<IGnssNiCallback::GnssUserResponseType>(notification->default_response),