Fix lunch choices for git_main am: d9a3d4d7dd

Original change: https://android-review.googlesource.com/c/device/google/shusky/+/2886846

Change-Id: Ief5a7840d81770bf3771af9a9cde2474d505c4a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>