message: Enable VMStats by default
  Summary: As title.
diff: @@ -299,9 +299,10 @@ void PassManager::run_passes(DexStoresVector& stores, ConfigFiles& conf) {
  sanitizers::lsan_do_recoverable_leak_check();
  - const bool hwm_pass_stats = traceEnabled(STATS, 1);
  + const bool hwm_pass_stats =
  + traceEnabled(STATS, 1) || conf.get_json_config().get("mem_stats", true);
  const bool hwm_per_pass =
  - conf.get_json_config().get("mem_stats_per_pass", false);
  + conf.get_json_config().get("mem_stats_per_pass", true);
  for (size_t i = 0; i < m_activated_passes.size(); ++i) {
  Pass* pass = m_activated_passes[i];
  