Merge "Filter REL out of preview codenames." into main am: 6a6e7731 am: bc07c013 am: 7b6c7471

Original change: https://android-review.googlesource.com/c/platform/build/+/2775701



Change-Id: If6f24f7b1cccd139d68a8a28f312a8cd99353c77
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>