Test uuid for test volumes

The cros-disks testing framework creates cros-disks volumes without
creating disks. Because of that, the volume uuid doesn't exist and hence
is not flown through Android. Because Android expects every volumes
should have uuid, we should fake it.

BUG=b:73951794
TEST=ChromeOS autotest

Change-Id: I62f1443d08d11ca47327e94f5f9e393b5476ec89
Reviewed-on: https://chromium-review.googlesource.com/c/1411965
Reviewed-by: Ryo Hashimoto <hashimoto@chromium.org>
Commit-Queue: Risan <risan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624528}
1 file changed