Deprecate flattened apexes am: 2ac1f2fa am: 14f745b4 am: 69d815de am:...

Deprecate flattened apexes am: 2ac1f2fa am: 14f745b4 am: 69d815de am: 55f3ef38 am: cd187878

Original change: https://android-review.googlesource.com/c/platform/build/+/2637110



Change-Id: Ibd5c999f9715b477693e22dcd202f349b95988fb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>