NuPlayerDecoder: release MediaBuffers when decoder is deleted.

Bug: 17454455
Change-Id: Ic984c74826f87f5f3c27756a7e7d52295a529bed
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp b/media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp
index cdb860c..1b1b1c8 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerDecoder.cpp
@@ -53,6 +53,10 @@
 }
 
 NuPlayer::Decoder::~Decoder() {
+    mDecoderLooper->unregisterHandler(id());
+    mDecoderLooper->stop();
+
+    releaseAndResetMediaBuffers();
 }
 
 static