Use event playback position in EventLogger.

We currently use the playback position in the current window, not the
position in the window the event belongs to. This creates confusing
outputs, e.g, window=1, mediaPos=100, even if the position refers to
window 0.

issue:#7332
PiperOrigin-RevId: 310896908

library/core/src/main/java/com/google/android/exoplayer2/util/EventLogger.java

@@ -553,7 +553,7 @@ private String getEventTimeString(EventTime eventTime) {
     return "eventTime="
         + getTimeString(eventTime.realtimeMs - startTimeMs)
         + ", mediaPos="
-        + getTimeString(eventTime.currentPlaybackPositionMs)
+        + getTimeString(eventTime.eventPlaybackPositionMs)
         + ", "
         + windowPeriodString;
   }