Add meta data extensions to support APE playback

To support APE playback, our APE decoder requires 2 parameters
"first_byte" and "curr_frame" to decode APE frame.

Bug: 143118093
Test: We test APE playback with our extractor and decoder and
it can work normally when it seeks during APE playback.
Change-Id: I47b83252187206a1660b63fe68396997869546c8

media/libstagefright/MediaTrack.cpp

@@ -183,6 +183,11 @@ status_t MediaTrackCUnwrapper::read(MediaBufferBase **buffer, const ReadOptions
             meta.setData(kKeyAudioPresentationInfo,
                     MetaDataBase::Type::TYPE_NONE, valbuf->data(), valbuf->size());
         }
+        if (format->mFormat->findBuffer("csd-0", &valbuf)) {
+            meta.setData(kKeyOpaqueCSD0,
+                    MetaDataBase::Type::TYPE_NONE, valbuf->data(), valbuf->size());
+        }
+
     } else {
         *buffer = nullptr;
     }