@VisibleForTesting
  float calculateScore(DiskStorage.Entry entry, long now) {
    long ageMs = now - entry.getTimestamp();
    long bytes = entry.getSize();
    return mAgeWeight * ageMs + mSizeWeight * bytes;
  }
Calculates an eviction score.

<p>Entries with a higher eviction score should be evicted first.
imagepipeline-base/src/main/java/com/facebook/cache/disk/ScoreBasedEvictionComparatorSupplier.java