Temporarily disabling OpenSL ES for playout.

TBR=tommi
BUG=b/21485703

Review URL: https://webrtc-codereview.appspot.com/52619004

Cr-Commit-Position: refs/heads/master@{#9329}
diff --git a/webrtc/modules/audio_device/android/audio_manager.cc b/webrtc/modules/audio_device/android/audio_manager.cc
index 2dc6e41..5caeebb 100644
--- a/webrtc/modules/audio_device/android/audio_manager.cc
+++ b/webrtc/modules/audio_device/android/audio_manager.cc
@@ -141,7 +141,10 @@
 bool AudioManager::IsLowLatencyPlayoutSupported() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   ALOGD("IsLowLatencyPlayoutSupported()");
-  return low_latency_playout_;
+  // TODO(henrika): enable again once issue in b/21485703 has been sorted out.
+  // This is just a temporary fix.
+  ALOGW("NOTE: OpenSL ES output is currently disabled!");
+  return false;
 }
 
 int AudioManager::GetDelayEstimateInMilliseconds() const {