Fix NDK libsync to match ndk/sync.h

The header names were changed during review, but the library map file
wasn't updated.

Bug: 62229958
Test: CtsGraphicsTestCases:android.graphics.cts.SyncTest
Change-Id: Ie5955865667b35067f1ee209933f159f170419cd
diff --git a/libsync/libsync.map.txt b/libsync/libsync.map.txt
index daa28ae..f9057bd 100644
--- a/libsync/libsync.map.txt
+++ b/libsync/libsync.map.txt
@@ -17,8 +17,8 @@
 LIBSYNC {
   global:
     sync_merge; # introduced=26
-    sync_get_fence_info; # introduced=26
-    sync_free_fence_info; # introduced=26
+    sync_file_info; # introduced=26
+    sync_file_info_free; # introduced=26
   local:
     *;
 };