Remove libmedia and libstagefright dependency from extractors

- MediaSource, DataSource and MediaExtractor are moved to
  libmediaextractor so that they can be used by extractor
  implementations without depending on libmedia and libstagefright.
- XXXFactory classes has been added in order not to expose CreateXXX
  methods in libmediaextractor.
- avc_utils is moved to libstagefright_foundation since most of
  extractor implementations are relying on that.

Test: build + post submit media CTS tests
Bug: 65851881
Change-Id: I7d5cf18dd25abc10478ac3f6e7d1828ad023e3fb
diff --git a/media/extractors/mp4/ItemTable.cpp b/media/extractors/mp4/ItemTable.cpp
index b476c75..f54b405 100644
--- a/media/extractors/mp4/ItemTable.cpp
+++ b/media/extractors/mp4/ItemTable.cpp
@@ -18,7 +18,7 @@
 #define LOG_TAG "ItemTable"
 
 #include <ItemTable.h>
-#include <media/stagefright/DataSource.h>
+#include <media/DataSource.h>
 #include <media/stagefright/MetaData.h>
 #include <media/stagefright/MediaErrors.h>
 #include <media/stagefright/foundation/ABuffer.h>