Merge "Fix directory iteration when path disappears."

import com.android.internal.util.Preconditions;

import java.io.IOException;

import java.nio.file.DirectoryIteratorException;

import java.nio.file.DirectoryStream;

import java.nio.file.Files;

import java.nio.file.Path;

                }

                threadCpuUsages.add(threadCpuUsage);

            }

        } catch (IOException e) {

        } catch (IOException | DirectoryIteratorException e) {

            // Expected when a process finishes

            return null;

        }