Merge "Allow appending members to structs and classes" am: efd3826863

Original change: https://android-review.googlesource.com/c/platform/development/+/2229078

Change-Id: I86f9478f3177fbb4b0c96e7d4f3c6b91aa64f6c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>