Revert "Revert "Update GNSS Batching to use new GnssLocation with elapsed realtime (HAL)""

This reverts commit b3721a68f273c305ea8e151cd3a8c192605370fc.

Reason for revert: 
It appears that the build includes ag/6721678 but not ag/6762021 even though they both were submitted together. Hence the build errors.

Change-Id: I4e58b29239d291ae3621b90e4507de8eb8838298
diff --git a/gnss/2.0/Android.bp b/gnss/2.0/Android.bp
index 30dc55d..6cfd346 100644
--- a/gnss/2.0/Android.bp
+++ b/gnss/2.0/Android.bp
@@ -12,6 +12,8 @@
         "IAGnssCallback.hal",
         "IAGnssRil.hal",
         "IGnss.hal",
+        "IGnssBatching.hal",
+        "IGnssBatchingCallback.hal",
         "IGnssCallback.hal",
         "IGnssConfiguration.hal",
         "IGnssDebug.hal",