Merge "PolicyVersionUpgrader: fix ERROR + stacktrace on first boot" into main

import java.io.IOException;

import java.nio.charset.Charset;

import java.nio.file.Files;

import java.nio.file.NoSuchFileException;

import java.util.ArrayList;

import java.util.List;

            String versionString = Files.readAllLines(

                    file.toPath(), Charset.defaultCharset()).get(0);

            return Integer.parseInt(versionString);

        } catch (NoSuchFileException e) {

            return 0; // expected on first boot

        } catch (IOException | NumberFormatException | IndexOutOfBoundsException e) {

            Slog.e(LOG_TAG, "Error reading version", e);

            return 0;