Split CEA-608 Closed caption into 4 tracks CC1~CC4

Bug: 16463078

Change-Id: Ib3073090934232016e535fbb8fa56cdf9d7ab6eb
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
index ae22123..bfe2710 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
@@ -1540,6 +1540,10 @@
         ALOGE_IF(mFlushingVideo != NONE,
                 "video flushDecoder() is called in state %d", mFlushingVideo);
         mFlushingVideo = newStatus;
+
+        if (mCCDecoder != NULL) {
+            mCCDecoder->flush();
+        }
     }
 }