Merge "releasetools: Remove deprecated BOARD_BUILD_SYSTEM_ROOT_IMAGE" into...

Merge "releasetools: Remove deprecated BOARD_BUILD_SYSTEM_ROOT_IMAGE" into main am: 7a519aeb am: 9047aa53

Original change: https://android-review.googlesource.com/c/platform/build/+/2855526



Change-Id: I6665d36181aa00a71c4ac22f08938a735d728479
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>