Merge "Change default arch for banchan to arm64" am: 3f65d6d8 am: 10129759 am: ee35c256

Original change: https://android-review.googlesource.com/c/platform/build/+/2105084



Change-Id: I26bbeed6823967eada1fb4b68c5eb9d06d80e883
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>