Bugfix: If no renderers enabled, we don't need buffer

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=129987973

library/src/main/java/com/google/android/exoplayer2/ExoPlayerImplInternal.java

@@ -467,8 +467,8 @@ import java.io.IOException;
       setState(ExoPlayer.STATE_ENDED);
       stopRenderers();
     } else if (state == ExoPlayer.STATE_BUFFERING) {
-      if ((enabledRenderers.length > 0 ? allRenderersReadyOrEnded : isTimelineReady)
-          && haveSufficientBuffer(rebuffering)) {
+      if ((enabledRenderers.length > 0
+          ? (allRenderersReadyOrEnded && haveSufficientBuffer(rebuffering)) : isTimelineReady)) {
         setState(ExoPlayer.STATE_READY);
         if (playWhenReady) {
           startRenderers();