[F20] Update tauto_driver for CLI, and add results parsing

BUG=b:188712078
TEST=./fast_build.sh -t
chromiumos/test/execution/cmd/testexecserver/internal/driver, && ./fast_build.sh -t chromiumos/test/execution/cmd/testexecserver/internal/tautoresults

Change-Id: Ifbd13bf7cb9e67790fbd7989ee2f6c65225319af
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2973221
Reviewed-by: Seewai Fu <seewaifu@google.com>
Reviewed-by: C Shapiro <shapiroc@chromium.org>
Commit-Queue: Derek Beckett <dbeckett@chromium.org>
Tested-by: Derek Beckett <dbeckett@chromium.org>
4 files changed