[code-health] Update .vpython file in //tools/android/instant_start

Bug: 1336295
Change-Id: Ia9b23fc808e896c91cae2e879144d67adfc8288e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3892098


Commit-Queue: Fabrice de Gans <fdegans@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1046025}