enter_chroot: copy application_default_credentials.json to chroot

This is beginning step of http://go/reclient_build_packages_for_chrome

Although we are still discussing where we put reclient, I think we
need to use gcloud auth for reclient as prod auth is not available in
chroot.

ref: http://go/chromium-devs-auth-to-rbe

BUG=b:203606263
TEST=confirms cros_sdk copies the credential file.
Change-Id: I03e1686dc77ff13456ba4ee5ddb9433974ccedf1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3774284
Tested-by: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed