Pass non-null logger into DefaultDrmSessionManager

Issue: #2903

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=158142226

demo/src/main/java/com/google/android/exoplayer2/demo/PlayerActivity.java

@@ -239,6 +239,13 @@ public class PlayerActivity extends Activity implements OnClickListener, ExoPlay
     Intent intent = getIntent();
     boolean needNewPlayer = player == null;
     if (needNewPlayer) {
+      TrackSelection.Factory adaptiveTrackSelectionFactory =
+          new AdaptiveTrackSelection.Factory(BANDWIDTH_METER);
+      trackSelector = new DefaultTrackSelector(adaptiveTrackSelectionFactory);
+      trackSelectionHelper = new TrackSelectionHelper(trackSelector, adaptiveTrackSelectionFactory);
+      lastSeenTrackGroupArray = null;
+      eventLogger = new EventLogger(trackSelector);
+
       UUID drmSchemeUuid = intent.hasExtra(DRM_SCHEME_UUID_EXTRA)
           ? UUID.fromString(intent.getStringExtra(DRM_SCHEME_UUID_EXTRA)) : null;
       DrmSessionManager<FrameworkMediaCrypto> drmSessionManager = null;
@@ -266,16 +273,8 @@ public class PlayerActivity extends Activity implements OnClickListener, ExoPlay
       DefaultRenderersFactory renderersFactory = new DefaultRenderersFactory(this,
           drmSessionManager, extensionRendererMode);
 
-      TrackSelection.Factory adaptiveTrackSelectionFactory =
-          new AdaptiveTrackSelection.Factory(BANDWIDTH_METER);
-      trackSelector = new DefaultTrackSelector(adaptiveTrackSelectionFactory);
-      trackSelectionHelper = new TrackSelectionHelper(trackSelector, adaptiveTrackSelectionFactory);
-      lastSeenTrackGroupArray = null;
-
       player = ExoPlayerFactory.newSimpleInstance(renderersFactory, trackSelector);
       player.addListener(this);
-
-      eventLogger = new EventLogger(trackSelector);
       player.addListener(eventLogger);
       player.setAudioDebugListener(eventLogger);
       player.setVideoDebugListener(eventLogger);