Disable vorbis seek when streaming from localhost.

Change-Id: Icda523ae1c89e26482f1c1767fe3a8b9222bb30f
related-to-bug: 2654400
diff --git a/media/libstagefright/MediaExtractor.cpp b/media/libstagefright/MediaExtractor.cpp
index 832db04..dfddbe0 100644
--- a/media/libstagefright/MediaExtractor.cpp
+++ b/media/libstagefright/MediaExtractor.cpp
@@ -36,6 +36,10 @@
     return new MetaData;
 }
 
+uint32_t MediaExtractor::flags() const {
+    return CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE;
+}
+
 // static
 sp<MediaExtractor> MediaExtractor::Create(
         const sp<DataSource> &source, const char *mime) {