Fix lunch choices for git_main am: 644a59b607

Original change: https://android-review.googlesource.com/c/device/google/lynx/+/2811080

Change-Id: I24131673d1b67e98b9f23382dd4bd8b3bcf364c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

AndroidProducts.mk

@@ -20,4 +20,4 @@ PRODUCT_MAKEFILES := \
     $(LOCAL_DIR)/factory_lynx.mk
 
 COMMON_LUNCH_CHOICES := \
-    aosp_lynx-userdebug
+    aosp_lynx-trunk_staging-userdebug