fix(Prefetch): Use the same references time for evict and prefetchSeg…

…mentsByTime (#7003)

Using different time bases can result in duplicate or unnecessary
segments being downloaded in HLS LL

lib/media/streaming_engine.js

@@ -1400,7 +1400,7 @@ shaka.media.StreamingEngine = class {
 
     if (mediaState.segmentPrefetch && mediaState.segmentIterator &&
         !this.audioPrefetchMap_.has(mediaState.stream)) {
-      mediaState.segmentPrefetch.evict(presentationTime);
+      mediaState.segmentPrefetch.evict(reference.startTime);
       mediaState.segmentPrefetch.prefetchSegmentsByTime(reference.startTime);
     }