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/SampleTable.cpp b/media/extractors/mp4/SampleTable.cpp
index 6d64519..fe25e95 100644
--- a/media/extractors/mp4/SampleTable.cpp
+++ b/media/extractors/mp4/SampleTable.cpp
@@ -25,9 +25,9 @@
 
 #include <arpa/inet.h>
 
+#include <media/DataSource.h>
 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/foundation/ByteUtils.h>
-#include <media/stagefright/DataSource.h>
 
 /* TODO: remove after being merged into other branches */
 #ifndef UINT32_MAX