void setLastCompactAllTime(long lastCompactAllTime) {
    this.lastCompactAllTime = lastCompactAllTime;
  }
Set the last time when {@link CompactAllPolicy} has been selected.
@param lastCompactAllTime last time when {@link CompactAllPolicy} has been selected.
ambry-store/src/main/java/com/github/ambry/store/CompactionPolicySwitchInfo.java