@GuardedBy("lock")
  private void updateStats() {
    mInternalStatFs = updateStatsHelper(mInternalStatFs, mInternalPath);
    mExternalStatFs = updateStatsHelper(mExternalStatFs, mExternalPath);
    mLastRestatTime = SystemClock.uptimeMillis();
  }
@ GuardedBy ( "lock" ) private void updateStats ( ) { mInternalStatFs = updateStatsHelper ( mInternalStatFs , mInternalPath ) ; mExternalStatFs = updateStatsHelper ( mExternalStatFs , mExternalPath ) ; mLastRestatTime = SystemClock . uptimeMillis ( ) ; }
(Re)calculate the stats.
It is the callers responsibility to ensure thread-safety.
Assumes that it is called after initialization (or at the end of it).