Move UXX_AT families to libstagefright_foundation

Byte handling utilities moved to libstagefright_foundation so that
they can be used in extractors without depending on libstagefright.

Test: build
Bug: 65851881
Change-Id: If72d8befadf3e63a93396f08efac0d6e3f4e273e
diff --git a/media/extractors/mp3/VBRISeeker.cpp b/media/extractors/mp3/VBRISeeker.cpp
index 24002db..42cebfe 100644
--- a/media/extractors/mp3/VBRISeeker.cpp
+++ b/media/extractors/mp3/VBRISeeker.cpp
@@ -26,8 +26,8 @@
 #include "avc_utils.h"
 
 #include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/foundation/ByteUtils.h>
 #include <media/stagefright/DataSource.h>
-#include <media/stagefright/Utils.h>
 
 namespace android {