presubmits: add types to

Since presubmits handle py3 gracefully now && we're starting to add
types in many places, it seems worth it to add these for better
understandability in the future.

No functional change is intended.

TEST=Ran the presubmits.

Change-Id: If4134b4d10b0f3692a52803e12c8e503b4574be5
Reviewed-by: Manoj Gupta <>
Tested-by: George Burgess <>
1 file changed