NuPlayer: seek to current position when changing video surface and audio decoder exists.

Bug: 22228075
Change-Id: I8b233319f48d2d0a49b44063cd895dc94949a489
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
index a9d8904..4a1a34d 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
@@ -639,7 +639,7 @@
 
             mDeferredActions.push_back(new SetSurfaceAction(surface));
 
-            if (obj != NULL) {
+            if (obj != NULL || mAudioDecoder != NULL) {
                 if (mStarted) {
                     // Issue a seek to refresh the video screen only if started otherwise
                     // the extractor may not yet be started and will assert.