Fix libmedia and libstagefright to get expat header files from the approved location.

Found during a libexpat upgrade.

Change-Id: I9e5abd502a884975d898486edde374fb2519164e
diff --git a/media/libmedia/MediaProfiles.cpp b/media/libmedia/MediaProfiles.cpp
index 84bc7a7..48bbf8f 100644
--- a/media/libmedia/MediaProfiles.cpp
+++ b/media/libmedia/MediaProfiles.cpp
@@ -23,7 +23,7 @@
 #include <utils/Log.h>
 #include <utils/Vector.h>
 #include <cutils/properties.h>
-#include <expat.h>
+#include <libexpat/expat.h>
 #include <media/MediaProfiles.h>
 #include <media/stagefright/foundation/ADebug.h>
 #include <OMX_Video.h>