OpenSL ES: fix QAudioOutput state after resume().

In push mode, the state must be IdleState after resume(), and only
change to ActiveState once it receives some data.

Task-number: QTBUG-50390
Change-Id: Iaf47363196ee94b80ac4ebe58a588929af8d3fad
Reviewed-by: Pasi Petäjäjärvi <pasi.petajajarvi@theqtcompany.com>

src/plugins/opensles/qopenslesaudiooutput.cpp

@@ -238,7 +238,7 @@ void QOpenSLESAudioOutput::resume()
         return;
     }
 
-    setState(QAudio::ActiveState);
+    setState(m_pullMode ? QAudio::ActiveState : QAudio::IdleState);
     setError(QAudio::NoError);
 }