Migrate code generation to typed python. am: 32e6044366 am: 08f5975e4b

Original change: https://android-review.googlesource.com/c/device/google/cuttlefish_vmm/+/2818639

Change-Id: Ia1248ed5243cd93ad0d3f3b880634dd522f93de9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>