Merge "Implement support for build_prop.Footer_files" into main am: c26262eb

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3345422



Change-Id: Ic878aa5cb9178d29aea8c7016be7a7c4b1820afe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>