mediaplayer: ensure secure decoders are instantiated before starting source

Bug: 19984798
Change-Id: Iff13cf03c4ce3141380f4d7ab4a2b1045c5ce747
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.h b/media/libmediaplayerservice/nuplayer/NuPlayer.h
index edc2bd3..e99e598 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.h
@@ -201,6 +201,8 @@
 
     status_t instantiateDecoder(bool audio, sp<DecoderBase> *decoder);
 
+    status_t onInstantiateSecureDecoders();
+
     void updateVideoSize(
             const sp<AMessage> &inputFormat,
             const sp<AMessage> &outputFormat = NULL);