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/midi/Android.bp b/media/extractors/midi/Android.bp
index bf23688..79c43b4 100644
--- a/media/extractors/midi/Android.bp
+++ b/media/extractors/midi/Android.bp
@@ -8,9 +8,9 @@
 
     shared_libs: [
         "liblog",
-        "libmedia",
+        "libmedia",  // Needed for MidiIoWrapper
+        "libmediaextractor",
         "libsonivox",
-        "libstagefright",
         "libstagefright_foundation",
         "libutils",
     ],
diff --git a/media/extractors/midi/MidiExtractor.cpp b/media/extractors/midi/MidiExtractor.cpp
index 1f32cb3..a8509fc 100644
--- a/media/extractors/midi/MidiExtractor.cpp
+++ b/media/extractors/midi/MidiExtractor.cpp
@@ -25,7 +25,7 @@
 #include <media/stagefright/MediaBufferGroup.h>
 #include <media/stagefright/MediaDefs.h>
 #include <media/stagefright/MetaData.h>
-#include <media/stagefright/MediaSource.h>
+#include <media/MediaSource.h>
 #include <libsonivox/eas_reverb.h>
 
 namespace android {
diff --git a/media/extractors/midi/MidiExtractor.h b/media/extractors/midi/MidiExtractor.h
index 87a4a02..0fae94a 100644
--- a/media/extractors/midi/MidiExtractor.h
+++ b/media/extractors/midi/MidiExtractor.h
@@ -17,8 +17,8 @@
 #ifndef MIDI_EXTRACTOR_H_
 #define MIDI_EXTRACTOR_H_
 
-#include <media/stagefright/DataSource.h>
-#include <media/stagefright/MediaExtractor.h>
+#include <media/DataSource.h>
+#include <media/MediaExtractor.h>
 #include <media/stagefright/MediaBuffer.h>
 #include <media/stagefright/MediaBufferGroup.h>
 #include <media/MidiIoWrapper.h>