abitidy: Add an anonymous type id renumbering strategy using first member am: 69680726ad

Original change: https://android-review.googlesource.com/c/platform/external/libabigail/+/2200428

Change-Id: I0510501d3e8961be9df8e48b7b9a6b583e5b2eb0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>