Fix lunch choices for git_main am: 8e014ee491

Original change: https://android-review.googlesource.com/c/device/google/barbet/+/2810374

Change-Id: I08a99199f719533769d604823f52c5f0887916dc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>