abitidy: fix data member deduplication element filter am: 523589819d

Original change: https://android-review.googlesource.com/c/platform/external/libabigail/+/2575831

Change-Id: I09ba9039a606c10fa93571272827abbe225e9123
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>