Fix lunch choices for git_main am: eecbe76392

Original change: https://android-review.googlesource.com/c/device/google/felix/+/2809728

Change-Id: Iff4614a102fb82f92203b7838976577554f4c055
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>