Merge "Update Mainline rollback lifetime from 2 days to 14 days." into qt-dev

    private static final String TAG = "RollbackManager";

    // Rollbacks expire after 48 hours.

    // Rollbacks expire after 14 days.

    private static final long DEFAULT_ROLLBACK_LIFETIME_DURATION_MILLIS =

            TimeUnit.HOURS.toMillis(48);

            TimeUnit.DAYS.toMillis(14);

    // Lock used to synchronize accesses to in-memory rollback data

    // structures. By convention, methods with the suffix "Locked" require