Merge "Add diff_flags as a header_abi_checker property" into tm-dev am: 39a9db3b

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/soong/+/18482834



Change-Id: If88a48f19fdf83fa29606bbee8a98912db311002
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>