Support for media extraction from .mkv/.mka Matroska files in stagefright.

Change-Id: I4c26579828ad575523ccf58b0b5cb144046c04ca
related-to-bug: 2483739
diff --git a/media/libstagefright/DataSource.cpp b/media/libstagefright/DataSource.cpp
index a66f86b..475422d 100644
--- a/media/libstagefright/DataSource.cpp
+++ b/media/libstagefright/DataSource.cpp
@@ -20,6 +20,8 @@
 #include "include/WAVExtractor.h"
 #include "include/OggExtractor.h"
 
+#include "matroska/MatroskaExtractor.h"
+
 #include <media/stagefright/CachingDataSource.h>
 #include <media/stagefright/DataSource.h>
 #include <media/stagefright/FileSource.h>
@@ -94,6 +96,7 @@
     RegisterSniffer(SniffAMR);
     RegisterSniffer(SniffWAV);
     RegisterSniffer(SniffOgg);
+    RegisterSniffer(SniffMatroska);
 }
 
 // static