Add missing assignment in AACExtractor.

An assignment statement was dropped in MetaData refactoring change.

Test: passes MediaPlayerTest#testResumeAtEnd & testPositionAtEnd
Bug: 73948878
Change-Id: I9fd835afa24e1cc3c718f186a8b3d18bc1d427f8
diff --git a/media/extractors/aac/AACExtractor.cpp b/media/extractors/aac/AACExtractor.cpp
index bbc1ff8..9fc5a76 100644
--- a/media/extractors/aac/AACExtractor.cpp
+++ b/media/extractors/aac/AACExtractor.cpp
@@ -373,6 +373,7 @@
         *confidence = 0.2;
 
         off64_t *offPtr = (off64_t*) malloc(sizeof(off64_t));
+        *offPtr = pos;
         *meta = offPtr;
         *freeMeta = ::free;