Fixed session not terminated when bandwidth goes below the supported encoded bitrate (preload error).

Change-Id: Ib7bddaaaac7d48df7f18fab0c5d486624abe3119
related-to-bug: 5564453

proprietary/wvm/WVMExtractorImpl.cpp

@@ -154,9 +154,11 @@ void WVMExtractorImpl::Initialize()
         if (result != WV_Status_OK) {
             LOGE("WV_Setup returned status %d in WVMMediaSource::start\n", result);
             mSetupStatus = ERROR_IO;
+            WV_Teardown(mSession);
+            mSession = NULL;
+        } else {
+            mInfoListener->setSession(mSession);
         }
-
-        mInfoListener->setSession(mSession);
     }
 
     WV_SetWarningToErrorMS(10000);