abitidy: add functionality to remove top-level qualifiers on function parameter and return types am: 3888a5b0fd am: 9d46419b22

Original change: https://android-review.googlesource.com/c/platform/external/libabigail/+/2162198

Change-Id: I3fd855b644914182193ed3a69dd5c65dee1825eb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>