Fix lunch choices for git_main am: 6b5c8c3fff

Original change: https://android-review.googlesource.com/c/device/amlogic/yukawa/+/2811195

Change-Id: Ib4972c7597f36645de0ee1a325520d06633df2d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>