Restart crostini if required before sharing paths

Updated tests a little to use constant values rather than
true/false to make tests clearer.

Removed unneeded calls to SetChromeOSVersionInfoForTest

Bug: 878324
Change-Id: Ic8d41ff75084c6e3c037283e26f434c426167816
Reviewed-on: https://chromium-review.googlesource.com/c/1304273
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Reviewed-by: Timothy Loh <timloh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603833}
2 files changed