Fix lunch choices for git_main am: d14954014d

Original change: https://android-review.googlesource.com/c/device/generic/car/+/2811453

Change-Id: I324be1cd11b7e7fd7ad3c88ff67b1703900bf68f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>