Turns out GetConsoleMode fails if the user's console isn't native. This is sometimes the case for Git Bash.

Also moved the checking code out of the if block so it applies in generic console cases too.
This went unnoticed, because setup_color.py is currently only really used in Git scripts, which are piped.

Bug: 1001187
Change-Id: I93357e479f84122f759e419d15c02500809657d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1785605Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Marc-Antoine Ruel <maruel@chromium.org>
Commit-Queue: Raul Tambre <raul@tambre.ee>
Auto-Submit: Raul Tambre <raul@tambre.ee>